The cost to Trendy Traders of forfeiting the discount is 2% of the original price.The cost to Trendy Traders of forfeiting the discount can be calculated by determining the difference between the discounted price and the original price, and then expressing it as a percentage of the original price.
This will provide the percentage cost incurred by Trendy Traders for not taking advantage of the discount offer.
Trendy Traders purchased inventory on credit for R4,000, with the option to settle the account by paying R3,920 within 10 days or R4,000 within 60 days. To calculate the cost of forfeiting the discount, we subtract the discounted price from the original price: R4,000 - R3,920 = R80.
The percentage cost is obtained by dividing this difference (R80) by the original price (R4,000) and multiplying by 100: (R80/R4,000) * 100 = 2%.
Therefore, the cost to Trendy Traders of forfeiting the discount is 2% of the original price. This means that by not taking advantage of the discount offer and paying the full amount within 10 days, Trendy Traders incurs an additional cost equal to 2% of the purchase price.
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Simpson's 1/3 rule with n=4. F=∫
3
12
(100−x)
3
x
8
dx f(x)=
(100−x)
3
x
8
,a=3,b=12 and n=4 Therefore, h=12−3/4=9/4 Divide the interval [3,12] into n=4 subintervals of length h(=9/4) [x0,x1,x2,x3,x4]= [3,21/4,15/2,39/4,12] f(x0)=f(3)=6561/912673=0.00718877407 4f(x1)=4
∗
f(21/4)= 37822859361/13936624384= 2.71391825730933 2f(x2)=2∗f(15/2)=25.29850773892958 4f(x3)=2∗f(39/4)=444.380798687857631 f(x4)=f(12)=630.960180315 (a.) Trapezoidal rule with n=5. F=∫
3
12
(100−x)
3
x
8
dx f(x)=
(100−x)
3
x
8
,a=3,b=12 and n=5 Therefore, h=12−3/5=9/5 Divide the interval [3,12] into n=5 subintervals of length h(=9/5) [x0,x1,x2,x3,x4,x5]= [3,24/5,33/5,42/5,51/5,12] f(x0)=f(3)=6561/912673=0.00718877407 2f(x1)=2∗f(24/5)=3439853568/526612187 =0.653204321823 2f(x2)=2∗f(33/5)=8.837732481377 2f(x3)=2∗f(42/5)=64.5026954153 2f(x4)=2∗f(51/5)=323.59541519420 f(x5)=f(12)=630.960180315
The function f(x) is defined as (100-x)^3 / (8x), and the interval of integration is [3, 12]. The Simpson's 1/3 rule is used with n=4, which divides the interval into four subintervals of equal length, h=9/4.
The Simpson's 1/3 rule is applied to approximate the integral of a function over a given interval using a quadratic polynomial interpolation. To apply the Simpson's 1/3 rule, we calculate the function values at the endpoints and the midpoints of each subinterval. Then, we multiply these values by specific coefficients and sum them up to estimate the integral. The first paragraph provides the calculations and values obtained using the Simpson's 1/3 rule with n=4.
The second paragraph describes the Trapezoidal rule, which is another numerical integration method used to approximate definite integrals. In this case, the Trapezoidal rule is applied with n=5, dividing the interval [3, 12] into five subintervals of equal length, h=9/5. Similar to the Simpson's 1/3 rule, we calculate the function values at the endpoints and sum them up with specific coefficients to estimate the integral. The paragraph presents the calculated values using the Trapezoidal rule with n=5.
Overall, the Simpson's 1/3 rule and the Trapezoidal rule provide numerical approximations for the given integral. These methods divide the interval into smaller subintervals and evaluate the function at specific points within each subinterval to estimate the integral value.
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As an airplane is taking off at an airport its position is closely monitored by radar. The following three positions are measured with their corresponding times: x
1
=257.76 m at t
1
=4.30 s x
2
=308.07 m at t
2
=4.80s
1
x
3
=363.04 m at t
3
=5.30 s What is the acceleration of the airplane at t
2
=4.80 s ? (Assume that the acceleration of the airplane is constant:)
Acceleration = 10.0 m/s²
Given information:
x1 = 257.76 m;
t1 = 4.30 s
x2 = 308.07 m;
t2 = 4.80 s
x3 = 363.04 m;
t3 = 5.30 s
We have to calculate the acceleration of the airplane at t2 = 4.80 s.
So, the formula for acceleration is: a = (v - u) / (t - t0) where, v = final velocity, u = initial velocity, t = final time, t0 = initial time.
Let's calculate the velocity at time t2. We can use the following formula for that: v = u + at (where v is the final velocity). We assume the acceleration to be constant.
Therefore, acceleration of the airplane is: a = (v - u) / (t - t0)
Solving the above formula, we get: v = u + a (t - t0)
Substituting the given values, we get: v2 = v1 + a (t2 - t1)............. (1)
v1 = v0 + a (t1 - t0)............. (2)
Subtracting (2) from (1), we get: v2 - v1 = a (t2 - t1) - a (t1 - t0)
Solving the above equation for acceleration a, we get: a = (v2 - v1) / (t2 - t1)
Therefore, acceleration of the airplane at t2 = 4.80 s is: a = (v2 - v1) / (t2 - t1)
a = ((308.07 - 257.76) / (4.80 - 4.30))
a = 10.0 m/s²
Therefore, the acceleration of the airplane at t2 = 4.80 s is 10.0 m/s².
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For any set of n numbers y
1
,y
2
,⋯,y
n
, find 5. the value of μ that minimizes ∑
i=1
n
∣y
i
−μ∣.
[tex]y_i < \mu$,[/tex]Mean is a measure of central tendency in statistics. It is also referred to as arithmetic mean or average. The formula for calculating mean is
:[tex]$$\mu = \frac{1}{n}\sum_{i=1}^{n} y_i$$[/tex]
The derivative of the absolute deviation with respect to μ is:[tex]$$\frac{d}{d\mu} D = \frac{d}{d\mu} \sum_{i=1}^{n} \left|y_i - \mu \right| = \sum_{i=1}^{n} \frac{d}{d\mu} \left|y_i - \mu \right|$$[/tex]
Now, we need to consider two cases, one when [tex]$y_i \ge \mu$[/tex] and the other when[tex]$y_i < \mu$.For the first case, when $y_i \ge \mu$,[/tex]
we have:
[tex]$$\frac{d}{d\mu} \left|y_i - \mu \right| = -1$$[/tex]
For the second case, when [tex]$y_i < \mu$,[/tex]
we have:[tex]$$\frac{d}{d\mu} \left|y_i - \mu \right| = 1$$Hence, we get:$$\frac{d}{d\mu} D = \sum_{i=1}^{n} \frac{d}{d\mu} \left|y_i - \mu \right| = -\sum_{i=1}^{n} \left[y_i < \mu\right] + \sum_{i=1}^{n} \left[y_i \ge \mu\right]$$where $[y_i < \mu]$[/tex]is the Iverson bracket, which is equal to 1 when [tex]$y_i < \mu$[/tex] and 0 otherwise, and[tex]$[y_i \ge \mu]$[/tex] is the Iverson bracket, which is equal to 1 when [tex]$y_i \ge \mu$[/tex]and 0 otherwise.
The equation [tex]$\frac{d}{d\mu} D = 0$ becomes$$-\sum_{i=1}^{n} \left[y_i < \mu\right] + \sum_{i=1}^{n} \left[y_i \ge \mu\right] = 0$$[/tex]Multiplying by 2 and dividing by n gives us:[tex]$$\frac{2}{n}\sum_{i=1}^{n} \left[y_i < \mu\right] - 1 = 0$$[/tex].
Thus, the value of μ that minimizes the absolute deviation of any set of n numbers y1,y2,…,yn is equal to the average of the two medians of the set.
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A linear revenue function is R=38.44x. (a) What.is.the. slope m ? m= What does the marginal revenue mean? If the number of units sold is increased by this amount, the revenue decreases by $1. Each additional unit sold decreases the revenue by this many dollars. Each additional unit sold yields this many dollars in revenue. If the number of units sold is increased by this amount, the revenue increases by $1. (c) What is the revenue received from selling one more item if 32 are currently being sold?
(a) The slope of the linear revenue function R = 38.44x is 38.44 ,
(c) the revenue received from selling one more item when 32 items are currently being sold is $1230.08.
The slope, denoted by m, represents the rate of change or the "rise over run" of the function. In the context of a revenue function, the slope (m) represents the marginal revenue. Marginal revenue is the change in revenue resulting from a one-unit increase in the quantity of units sold (x).
In this case, since the slope of the function is 38.44, it means that for every one additional unit sold, the revenue increases by $38.44. Therefore, the correct statement is: Each additional unit sold yields this many dollars in revenue.
(c) To find the revenue received from selling one more item when 32 items are currently being sold, we can substitute x = 32 into the revenue function R = 38.44x.
R = 38.44 * 32
R = 1230.08
Therefore, the revenue received from selling one more item when 32 items are currently being sold is $1230.08.
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Solve constant yields Harvesting J ( = Yocln/ k ) -
H
Harvesting J (J = Yocln/k) is solved by dividing the natural logarithm of the constant yield Yoc by the constant rate of decay k, and multiplying it by the harvest H.
To solve the equation for constant yield harvesting, we use the formula J = Yocln/k, where J represents the harvest, Yoc is the constant yield, l represents the natural logarithm, and k is the constant rate of decay.
To find J, we divide the natural logarithm of Yoc by k and then multiply the result by H. This formula allows us to determine the harvesting amount J based on the specified values of Yoc, k, and H.
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Suppose that along a river, there are an average of 3 turtles per kilometre and an average
of 0.4 platypus per kilometre. Suppose that the locations of turtles along the river
are independent of other turtles and the locations of platypus are independent of other
platypus. Further suppose that the locations of turtles and platypus are independent of
each other.
(a) Let T and P be the counts of turtles and platypus, respectively, along a
randomly chosen stretch of 1 kilometre of the river. Justify why T follows a Poisson
distribution with λ = 3 and P follows a Poisson distribution with λ = 0.4.
The count of turtles, T, along a randomly chosen stretch of 1 kilometer of the river follows a Poisson distribution with a parameter λ of 3, while the count of platypus, P, follows a Poisson distribution with a parameter λ of 0.4.
The Poisson distribution is commonly used to model the number of events occurring in a fixed interval of time or space. It is appropriate in this case because the count of turtles and platypus along the river can be considered as a series of independent events.
For turtles, the average number of turtles per kilometer is given as 3. The Poisson distribution is characterized by a single parameter λ, which represents the average rate or intensity of the events. In this case, λ = 3, indicating that on average, there are 3 turtles per kilometer. The Poisson distribution describes the probability of observing a specific number of turtle sightings within the interval of 1 kilometer.
Similarly, for platypus, the average number of platypus per kilometer is given as 0.4. Using the same reasoning as above, the count of platypus follows a Poisson distribution with λ = 0.4.
The independence assumption is crucial for the Poisson distribution to be appropriate in this context. It implies that the presence or absence of turtles does not affect the presence or absence of other turtles, and the same applies to platypus.
Additionally, the independence between turtles and platypus means that the presence or absence of one species does not influence the presence or absence of the other species.
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Assume that the following has a linear cost function. \table[[Fixed Cost, Marginal Cost per item ],[Item Sells For, $300],[$9,$19]] Find the following. (a) the cost function (b) the revenue function (c) the profit function (d) the profit on 99 items
The cost function is \[C(x)=9+19x\]. The revenue function is \[R(x)= 300x\]. The profit on 99 items is $27720.
The following has a linear cost function:
\[\begin{matrix}\begin{matrix}\text{Fixed Cost}, & \text{Marginal Cost per item} \end{matrix}\\ \begin{matrix}\text{Item Sells For}, & $\text{300} \\ $\text{9} & $\text{19} \end{matrix}\end{matrix}\] Given the cost function, find the following:
(a) The cost function: The cost function is given by, \[C(x)=F+vx\]where, F is fixed cost and v is the marginal cost per item, and x is the number of items. Cost function for the given data,\[C(x)=F+vx\]Here, F= fixed cost = $9v = marginal cost per item v = $19So, \[C(x)=9+19x\]. Hence, the cost function is \[C(x)=9+19x\].
(b) The revenue function: Revenue function, \[R(x)= px\] where p is the selling price per item and x is the number of items. R(x) = p × x. Here, p = selling price per item = $300∴ R(x) = $300 × x = $300x. Hence, the revenue function is \[R(x)= 300x\].
(c) The profit function: Profit is the difference between revenue and cost. Profit function, \[P(x)= R(x)-C(x)\]Profit function, \[P(x)= R(x)-C(x)\]∴ P(x) = \[300x- (9+19x)\]\[⇒ P(x)=281x-9\]Therefore, the profit function is \[P(x)= 281x-9\].
(d) The profit on 99 items. Profit on 99 items, \[P(99)= 281(99)-9\]\[=27720\]. The profit on 99 items is $27720.
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"how
would i calculate percentage difference for part B and for
procedure C how do i get the Req parallel and the percentage
difference for it
PROCEDURE A: Ohm's Law \[ \begin{array}{l} \mathbf{R}_{1}: 3005 \% \\ \mathbf{R}_{2}: 16005 \% \\ \mathbf{R}_{3}: 22005 \% \end{array} \] Slope(include units) : Y-Intercept: Correlation Coefficient: R"
To find the percentage difference for part B and procedure C and to get the Req parallel and percentage difference for
The formula to find percentage difference is:(New Value - Old Value) / Old Value x 100To find the percentage difference for part B, follow the steps below: Old Value = 3005New Value = 16005Percentage Difference = (16005 - 3005) / 3005 x 100Percentage Difference = 433.27%Procedure C Percentage Difference. The formula to find percentage difference is:(New Value - Old Value) / Old Value x 100
To find the percentage difference for procedure C, follow the steps below: Old Value = 16005New Value = 22005Percentage Difference = (22005 - 16005) / 16005 x 100Percentage Difference = 37.48%Req ParallelThe formula to calculate Req parallel is:Req = (R1 * R2 * R3) / (R1R2 + R2R3 + R3R1)Req = (3005 * 16005 * 22005) / (3005 * 16005 + 16005 * 22005 + 22005 * 3005)Req = 750.79Ω
Percentage Difference for Req Parallel. The formula to find percentage difference is:(New Value - Old Value) / Old Value x 100To find the percentage difference for Req parallel, follow the steps below:Old Value = 750.79New Value = 1501.58Percentage Difference = (1501.58 - 750.79) / 750.79 x 100Percentage Difference = 99.81%
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Cumulative SAT scores are approximated well by a normal model with mean μ=1100 and standard deviation σ=200. If a student is asked to find P(x>1400) they are being asked to find The probability that x is less than 1400 The probability that x is greater than 1400 The probability that x is between 1100 and 1400
The probability that x is greater than 1400 is being asked in this scenario, which represents the likelihood of obtaining a SAT score higher than 1400. This can be determined by calculating the area under the normal distribution curve to the right of the given value.
In this problem, the mean (μ) of the SAT scores is given as 1100, and the standard deviation (σ) is given as 200. To find the probability that x is greater than 1400, we need to calculate the area under the normal curve to the right of 1400.
First, we need to convert the value of 1400 to a standard score, also known as a z-score. The formula for calculating the z-score is (x - μ) / σ, where x is the given value, μ is the mean, and σ is the standard deviation. Plugging in the values, we have (1400 - 1100) / 200 = 3 standard deviations above the mean.
Next, we can use a standard normal distribution table or a calculator to find the cumulative probability associated with a z-score of 3. The area to the left of a z-score of 3 is approximately 0.9987. Since we are interested in the probability to the right of 1400, we subtract the cumulative probability from 1: 1 - 0.9987 ≈ 0.0013.
Therefore, the probability that x is greater than 1400 is approximately 0.0013.
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Describe in English the languages denoted by the following regular expressions.
(a) a(a|b)∗ a
(b) (b* (ε|a))*
(c) (a|b)∗ a(a|b)(a|b)
(d) a *ba*ba*ba*
(e) (aa|bb)* ((ab|ba)(aa|bb)* (ab|ba)(aa|bb)* ) *
Note: Your description should be the most general high-level characterization. For example, (ba* ba*) * should be described as "All strings of a’s and b’s, beginning with b and having even number of b’s." not as, for example, "The string of b followed by any number of a’s followed by a b followed by any number of a’s, repeated any number of times."
(a) The regular expression denotes the language consisting of all strings that start and end with the letter 'a', and can have any combination of 'a' or 'b' in between.
(b) The regular expression (b*(ε|a))* denotes the language that includes all strings that can consist of any number of 'b's followed by either an empty string (ε) or an 'a'. This pattern can be repeated any number of times.
(c) The regular expression denotes the language containing strings that start and end with 'a', and have either 'a' or 'b' in between. The last three symbols can be any combination of 'a' or 'b'.
(d) The regular expression denotes the language consisting of strings that have 'a' followed by any number of 'b's, followed by 'a' again, and this pattern repeats any number of times.
(e) The regular expression denotes the language that includes strings consisting of alternating repetitions of 'aa' or 'bb', followed by a sequence that starts with either 'ab' or 'ba' and continues with alternating repetitions of 'aa' or 'bb'. This pattern can repeat any number of times.
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Consider two events A and B. Prove that (a) P(A)=P(A∩B)+P(A∩B
′
). (b) If B⊂A then P(A)=P(B)+P(A∩B
′
)
The task is to prove two statements: (a) P(A) = P(A∩B) + P(A∩B') and (b) If B⊂A, then P(A) = P(B) + P(A∩B').
(a) To prove P(A) = P(A∩B) + P(A∩B'), we start with the definition of the probability of an event A, which is given by P(A) = P(A∩B) + P(A∩B') + P(A∩B). By applying the principle of inclusion-exclusion, we know that P(A∩B') = P(A) - P(A∩B), as the intersection of A with its complement B' is the same as A minus the intersection of A with B. Therefore, substituting this in the original equation, we get P(A) = P(A∩B) + (P(A) - P(A∩B)), which simplifies to P(A) = P(A∩B) + P(A∩B'), proving statement (a).
(b) To prove that if B⊂A, then P(A) = P(B) + P(A∩B'), we first note that A∩B = B, since B is a subset of A. By substituting this in the equation from statement (a), we have P(A) = P(B) + P(A∩B'), which proves statement (b). This result holds because the probability of A can be split into two parts: P(B), representing the probability of events that are in both A and B, and P(A∩B'), representing the probability of events that are in A but not in B.
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2x + 1
x + 4
7 - 2x
4
Perimeter:
5/2
Work out the value of x using the perimeter and the expressions for the sides.
The value of x is -5/6 using the perimeter and the expressions for the sides, we can set up an equation based on the given expressions and the perimeter.
The perimeter is the sum of all the side lengths. In this case, we have four sides with lengths given by the expressions:
Side 1: 2x + 1
Side 2: x + 4
Side 3: 7 - 2x
Side 4: 4
The perimeter is given as 5/2, so we can write the equation:
Perimeter = Side 1 + Side 2 + Side 3 + Side 4
5/2 = (2x + 1) + (x + 4) + (7 - 2x) + 4
Now, we can simplify and solve for x:
5/2 = 2x + 1 + x + 4 + 7 - 2x +
5/2 = 5 + 3x
To get rid of the fraction, we can multiply both sides of the equation by 2:
2 * (5/2) = 2 * (5 + 3x)
5 = 10 + 6x
Next, we can isolate the variable x by subtracting 10 from both sides:
5 - 10 = 10 + 6x - 10
-5 = 6x
Finally, we solve for x by dividing both sides by 6:
-5/6 = x
Consequently, x has a value of -5/6.
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To evaluate ∫tan^3(x) sec^9 (x) dx
Let u = ________ then du = _________
We obtain ∫tan^3(x) sec^9 (x) dx = ∫ _________ . du= ____ + C
Therefore,
∫tan^3(x) sec^9 (x) dx = ______________ + C
To evaluate [tex]\(\int \tan^3(x) \sec^9(x) dx\)[/tex], we can use the u-substitution method.
Let [tex]\(u = \sec(x)\), then \(du = \sec(x) \tan(x) dx\)[/tex]. Rearranging the equation, we have [tex]\(dx = \frac{du}{\sec(x)\tan(x)}\)[/tex].
Substituting these values into the integral, we get:
[tex]\(\int \tan^3(x) \sec^9(x) dx = \int \tan^3(x) \sec^8(x) \sec(x) \tan(x) dx\).[/tex]
Now, replacing [tex]\(\tan^3(x) \sec^8(x)\)[/tex] with [tex]\(u^3\)[/tex], and substituting dx with [tex]\(\frac{du}{\sec(x)\tan(x)}\)[/tex], we have:
[tex]\(\int \tan^3(x) \sec^9(x) dx = \int u^3 \cdot \frac{1}{u} du\).[/tex]
Simplifying, we get:
[tex]\(\int \tan^3(x) \sec^9(x) dx = \int u^2 du\).[/tex]
Integrating [tex]\(u^2\)[/tex] with respect to u, we have:
[tex]\(\int u^2 du = \frac{u^3}{3} + C\).[/tex]
Therefore, [tex]\(\int \tan^3(x) \sec^9(x) dx = \frac{\sec^3(x)}{3} + C\).[/tex]
In conclusion, by substituting u = sec(x) and applying the u-substitution method, we can evaluate the integral [tex]\(\int \tan^3(x) \sec^9(x) dx\) as \(\frac{\sec^3(x)}{3} + C\)[/tex], where C represents the constant of integration.
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An object P has position x
(t)=(x(t),y(t)) at time t with respect to an origin. Its movement can be described by the system of linear differential equations x ′
(t)=2x(t)+t
y ′
(t)=6x(t)−y(t)+sin(t).
It is also given that object P has position (− 4
1
,1) when t=0. (a) Show that the system of linear differential equations can be rewritten in the matrix form x
′
(t)=A x
(t)+ f
(t) where matrix A and vector f
are to be determined. (5 marks) (b) Use Duhamel's Principle to solve the system of linear differential equation
This representation shows that the derivative of the vector x(t) equals the product of the matrix A and the vector x(t), plus the vector f(t).
(a) To rewrite the system of linear differential equations in matrix form, we can define the vector x(t) = [x(t), y(t)] and the matrix A as:
A = [[2, 0], [6, -1]]
Now, let's define the vector f(t) = [t, sin(t)]. The system of linear differential equations can be written as:
x'(t) = Ax(t) + f(t)
This representation shows that the derivative of the vector x(t) equals the product of the matrix A and the vector x(t), plus the vector f(t).
(b) To solve the system of linear differential equations using Duhamel's Principle, we can follow these steps:
Define the initial condition: According to the given information, when t = 0, the object P has position (-4, 1). Therefore, our initial condition is x(0) = [-4, 1].
Using Duhamel's Principle, the solution for the system of linear differential equations can be expressed as:
x(t) = e^(At) * x(0) + ∫[0,t] e^(A(t-s)) * f(s) ds
Here, e^(At) represents the matrix exponential of At.
Calculate the matrix exponential: To calculate e^(At), we need to find the eigenvalues and eigenvectors of matrix A. The eigenvalues are λ_1 = 1 and λ_2 = 2. The corresponding eigenvectors are v_1 = [0, -1] and v_2 = [1, 3].
Using these eigenvalues and eigenvectors, we can compute the matrix exponential e^(At):
e^(At) = P * diag(e^(λ_1t), e^(λ_2t)) * P^(-1)
where P is the matrix that contains the eigenvectors as columns, and diag() constructs a diagonal matrix with the given values.
Calculate the solution: Plugging in the values into the formula, we can find the solution:
x(t) = e^(At) * x(0) + ∫[0,t] e^(A(t-s)) * f(s) ds
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You are measuring the surface area of a rectangle by measuring height and width with a really good ruler. The height measurement was 10.910 m ± 0.0004 m m. The width measurement was 5.747 m ± 0.004 m m.
What is the absolute uncertainty in the area of the rectangle?
What is the fractional uncertainty in the area of the rectangle?
The given height of the rectangle is 10.910 m ± 0.0004 m
The given width of the rectangle is 5.747 m ± 0.004 m
To find the absolute uncertainty in the area of the rectangle, first find the area of the rectangle.
The area of the rectangle is given by;
Area (A) = length (l) × breadth (b)
We can use the given measurements to calculate the area of the rectangle as follows;
l = height
= 10.910 m ± 0.0004 m
b = width
= 5.747 m ± 0.004 m
Area (A) = l × b
= (10.910 m ± 0.0004 m) × (5.747 m ± 0.004 m)
Area (A) = (10.910 m × 5.747 m) ± [(0.0004 m/10.910 m + 0.004 m/5.747 m) × (10.910 m × 5.747 m)]
Area (A) = (62.63217 m²) ± (0.0004 m/10.910 m + 0.004 m/5.747 m) × (62.63217 m²)
Area (A) = (62.63217 m²) ± 0.0566 m²
Therefore, the absolute uncertainty in the area of the rectangle is 0.0566 m².
The fractional uncertainty in the area of the rectangle is given by;
Fractional uncertainty = absolute uncertainty/mean value
Fractional uncertainty = 0.0566 m²/62.63217 m²
Fractional uncertainty = 0.000903.
Therefore, the fractional uncertainty in the area of the rectangle is 0.000903.
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Find the particular solution. e
7x
y
′
=7(x+7)y
8
,y(0)=
7
50
In this problem, we are given a differential equation [tex]e^{(7x)}y' = 7(x+7)y^8[/tex] with an initial condition y(0) = 750. We are tasked with finding the particular solution to this differential equation. The first paragraph provides a summary of the answer, while the second paragraph explains the process of finding the particular solution.
To find the particular solution to the given differential equation, we need to solve the equation by separating variables and integrating.
Starting with the given differential equation [tex]e^{(7x)}y' = 7(x+7)y^8[/tex], we can rearrange the equation to isolate the variables:
[tex]\frac{dy}{y^8} = \frac{(7(x+7))}{e^{(7x)} dx}[/tex]
Now we can integrate both sides of the equation. The integral of [tex]\frac{dy}{y^8}[/tex]can be evaluated using the power rule for integration, while the integral of [tex]\frac{(7(x+7))}{e^{(7x)} dx}[/tex]requires integration techniques such as integration by parts or substitution.
After integrating both sides, we obtain an equation involving the variable y and x. We can then solve this equation to find the particular solution. To determine the specific constant of integration, we can use the initial condition y(0) = 750. By substituting the initial condition into the equation, we can solve for the constant and obtain the particular solution to the differential equation.
In conclusion, by separating variables, integrating, and using the initial condition, we can find the particular solution to the given differential equation [tex]e^{(7x)}y' = 7(x+7)y^8[/tex]. The particular solution will be in terms of the variable x and will satisfy the initial condition y(0) = 750.
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The geometric (p) distribution on { 0, 1, 2, ... }. The geometric (p) distribution is often defined as a distribution on {0, 1, 2, ...} instead of {1, 2, 3,...). A random variable W has geometric (p) distribution on {0, 1, 2,...} if P(W = k) = q p (k = 0,1,...)
a) Show that this is the distribution of the number of failures before the first success
in Bernoulli (p) trials.
b) Find P(W> k) (k = 0,1,...) c) Find E(W). d) Find Var(W).
a) This is the distribution of the number of failures before the first success in Bernoulli (p) trials.Suppose a Bernoulli trial is performed, and let p denote the probability of success in any given trial.
Let the random variable W denote the number of failures before the first success in a sequence of independent trials. So,The first trial can be either a failure or a success with the following probabilities:
P(W = 0) = p (1st success on first trial)P(W = 1) = q p (1st success on second trial)P(W = 2) = q2 p (1st success on third trial)…P(W = k) = q k p (1st success on k + 1th trial)b) P(W > k) (k = 0,1,...).
To find P(W > k), we will calculate the probability that the first success occurs in the first k + 1 trials, which is the same as 1 - P(W <= k). So, P(W > k) = qk + 1. Hence, P(W > k) = 1 - (1 - p) k+1.
c) Find E(W).Expectation of W isE(W) = (0)(P(W = 0)) + (1)(P(W = 1)) + (2)(P(W = 2)) + … + (k)(P(W = k)) + … = Σk=0∞ kq k p.
Using the formula for the sum of a geometric series, Σk=0∞ q k = 1/(1 - q), we get: E(W) = Σk=0∞ kq k p = p/(1 - q).d) Find Var(W).The variance of W isVar(W) = E(W2) - [E(W)]2Let's find E(W2) first.E(W2) = (02)(P(W = 0)) + (12)(P(W = 1)) + (22)(P(W = 2)) + … + (k2)(P(W = k)) + … = Σk=0∞ k2q k p.
Using the formula for the sum of the squares of the first n natural numbers, Σk=1n k2 = n(n + 1)(2n + 1)/6, we have: E(W2) = Σk=0∞ k2q k p = 2p/(1 - q)2. Hence, Var(W) = E(W2) - [E(W)]2 = [2p/(1 - q)2] - [p/(1 - q)]2 = p(1 - p)/(1 - q)2.
Therefore, the geometric (p) distribution is the distribution of the number of failures before the first success in Bernoulli (p) trials. It is given by:P(W = k) = q k p (k = 0,1,...).
The probability that W is greater than k is given by:P(W > k) = qk + 1The expected value of W is given by:E(W) = p/(1 - q)And, the variance of W is given by:Var(W) = p(1 - p)/(1 - q)2.
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2. Discuss the singularities of the function \( f(z)=\frac{\left(z^{2}-1\right)(z-2)^{3}}{(\sin (\pi z))^{3}} \) in the complex plane.
The function \(f(z)\) has **simple poles at \(z = 0, \pm 1\)** and a **triple pole at \(z = 2\)**. These singularities are points in the complex plane where the function is not defined or behaves in a special way. Analyzing the singularities helps in understanding the behavior and properties of the function, such as its poles, residues, and contour integration in complex analysis.
The function \( f(z) = \frac{\left(z^{2}-1\right)(z-2)^{3}}{(\sin (\pi z))^{3}} \) has singularities at the points where the denominator \(\sin(\pi z)\) becomes zero. Let's analyze the nature of these singularities in the complex plane.
The singularities of \(\sin(\pi z)\) occur when the argument \(\pi z\) is an integer multiple of \(\pi\), i.e., \(\pi z = n\pi\) where \(n\) is an integer. Solving for \(z\), we have \(z = \frac{n}{\pi}\).
1. **Simple Pole at \(z = 0\):** When \(n = 0\), we have \(z = 0\). At \(z = 0\), the factor \(\sin(\pi z)\) does not become zero, and the numerator does not have any singularities. Hence, \(z = 0\) is a simple pole.
2. **Poles at \(z = \pm 1\):** When \(n = \pm 1\), we have \(z = \pm 1\). At \(z = \pm 1\), the factor \(\sin(\pi z)\) becomes zero, and the numerator \(\left(z^{2}-1\right)(z-2)^{3}\) does not. Hence, \(z = \pm 1\) are simple poles.
3. **Triple Pole at \(z = 2\):** When \(n = 2\), we have \(z = 2\). At \(z = 2\), the factor \(\sin(\pi z)\) becomes zero, and the numerator has a simple zero at \(z = 2\). Therefore, \(z = 2\) is a triple pole.
To summarize, the function \(f(z)\) has **simple poles at \(z = 0, \pm 1\)** and a **triple pole at \(z = 2\)**. These singularities are points in the complex plane where the function is not defined or behaves in a special way. Analyzing the singularities helps in understanding the behavior and properties of the function, such as its poles, residues, and contour integration in complex analysis.
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In Round Robin scheduling assume that time quantum $\mathrm{Tq}=12$ units, and there are 7 active processes. What is the maximum waiting time for a process to get the next quantum?
56
72
64
84
The maximum waiting time for a process to get the next quantum in Round Robin scheduling with a time quantum of 12 units and 7 active processes is 72 units.
In Round Robin scheduling, each process is given a fixed time quantum to execute before being preempted and allowing the next process to run. The time quantum determines the maximum amount of time a process can execute before it is interrupted. In this case, the time quantum is 12 units.
Assuming there are 7 active processes, the maximum waiting time for a process to get the next quantum can be calculated by considering the worst-case scenario. In this scenario, each process gets a turn to execute once, and then the cycle repeats. Therefore, the maximum waiting time for a process to get the next quantum is equal to the time taken for all other processes to complete their turn and for the cycle to repeat.
Since there are 7 processes, each process will have to wait for 6 other processes to complete their turn before it can get the next quantum. The total waiting time for a process is then given by (6 * time quantum). Substituting the value of the time quantum as 12 units, we have 6 * 12 = 72 units.
Therefore, the maximum waiting time for a process to get the next quantum in this scenario is 72 units.
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The continuous random variable X follows the probability density function f(x)={1/x20 for x>1 for x≤1 Find the probability density function fY(y) for the random variable Y with Y=X
The probability density function fY(y) for the random variable Y, defined as Y = X, is fY(y) = 1/(y^2) for y > 1, and fY(y) = 0 for y ≤ 1. To find the probability density function (PDF) of the random variable Y, we need to apply the transformation rule for probability density functions.
Let Y = X. Since Y is defined as the same variable as X, the PDF of Y, denoted as fY(y), is equal to the PDF of X, denoted as fX(x), evaluated at the corresponding values of y.
For y > 1, we have fY(y) = fX(y).
Since fX(x) is given as f(x) = 1/(x^2), we can substitute y for x to obtain the PDF of Y for y > 1:
fY(y) = fX(y) = 1/(y^2) for y > 1.
However, for y ≤ 1, the PDF is zero because the original PDF is only defined for x > 1.
Therefore, the probability density function fY(y) for the random variable Y, defined as Y = X, is fY(y) = 1/(y^2) for y > 1, fY(y) = 0 for y ≤ 1.
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Refer to the accompanying data display that results from a simple random sample of times (minutes) between eruptions of the Old Faithful geyser. The confidence level of 95% was used. Complete parts (a) and (b) below. a. Express the confidence interval in the format that uses the "less than" symbol Round the confidence interval limits given that the original times are all rounded to one decimal place. 85.74 min <μ<91.76 min (Round to two decimal places as needed) b. Idensty the best point estimate of μ and the margin of error. The point estimate of μ is 8875 minutes. (Round to two decimal places as needed.) The margin of error is E=3.01 - minutes. (Round to two decimal places as needed.)
The confidence interval using the 'less than' symbol is 85.74 min < μ < 91.76 min and the best point estimate of μ is 8875 minutes, and the margin of error is 3.01 minutes.
a. The confidence interval expresses a range of values within which we can estimate the population mean (μ) with a certain level of confidence. In this case, the confidence level is 95%. The format that uses the "less than" symbol for the confidence interval is:
85.74 min < μ < 91.76 min
The lower limit of the confidence interval, 85.74 min, represents the estimated minimum value of the population mean, and the upper limit, 91.76 min, represents the estimated maximum value. Both limits are rounded to two decimal places, as indicated by the rounding of the original times to one decimal place.
b. The best point estimate of μ is the sample mean, denoted as x. In this case, it is given as 8875 minutes (rounded to two decimal places). The point estimate represents the most likely value of the population mean based on the observed sample data.
The (E) is a measure of the uncertainty in our estimate of the population mean. It represents the maximum amount by which the sample mean might deviate from the true population mean. In this case, the margin of error is given as 3.01 minutes (rounded to two decimal places).
To calculate the margin of error, we consider the width of the confidence interval. The width is determined by subtracting the lower limit from the upper limit:
Width = (91.76 min - 85.74 min) = 6.02 min
Since the confidence level is 95%, we want to find the margin of error that allows for a 2.5% chance of being below the lower limit and a 2.5% chance of being above the upper limit. Dividing the width by 2, we have:
Margin of Error (E) = 6.02 min / 2 = 3.01 min
Therefore, the best point estimate of μ is 8875 minutes, and the margin of error is 3.01 minutes. These values provide information about the estimated population mean and the range within which it is likely to fall.
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x^5/8
Divide x^1/4. (1 point)
A.x^5/32
B.x
C.x^7/8
D.x^3/8
The correct answer after dividing will be [tex]\(x^{3/8}\)[/tex]. Option D is the right answer.
To divide [tex]\(x^{1/4}\) by \(x^{5/8}\)[/tex], we subtract the exponents:
[tex]\(x^{1/4} \div x^{5/8} = x^{1/4 - 5/8}\)[/tex]
To simplify the exponent, we need a common denominator:
[tex]\(x^{1/4 - 5/8} = x^{2/8 - 5/8}\)[/tex]
Now, we can subtract the exponents:
[tex]\(x^{2/8 - 5/8} = x^{-3/8}\)[/tex]
When dividing exponents, we subtract the exponents. In this case, dividing [tex]\(x^{1/4}\) by \(x^{5/8}\)[/tex] gives us [tex]\(x^{1/4 - 5/8}\)[/tex]. To simplify the exponent, we find a common denominator, which is 8 in this case. Then, subtracting the exponents, we have [tex]\(x^{2/8 - 5/8}\)[/tex], which simplifies to [tex]\(x^{-3/8}\)[/tex]. Finally, we can rewrite [tex]\(x^{-3/8}\)[/tex] as [tex]\(x^{3/8}\)[/tex].
Therefore, the answer is [tex]\(x^{-3/8}\)[/tex], which can be simplified as [tex]\(x^{3/8}\)[/tex].
So, the correct answer is option D: [tex]\(x^{3/8}\)[/tex].
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Using truth tables, determine if the following propositions is a tautology, a contradiction, or a contingency. Using truth tables, determine if the following propositions are a tautology, a contradiction, or a contingency. (You will have 2 answers per item, its proposition, and a choice of Valid, Satisfiable, or Unsatisfiable. Either it will rain tomorrow, or it won't. 1. Proposition (P V P) 2. Valid Question 6 If you study, you will get a good grade. And you studied. Blank # 1 Blank # 2 If you study, you will get a good grade. Or if you get a good grade, then you studied. Blank # 1 Blank # 2 Question 8 They will win and they will celebrate. And they will not win. Blank # 1 Blank # 2
1. (P V P) is a tautology. 2. Valid, Satisfiable 3. Unsatisfiable, Unsatisfiable 4. Contradiction, Unsatisfiable.
To determine if the given propositions are a tautology, a contradiction, or a contingency, we can construct truth tables for each proposition and analyze the results.
1. Proposition (P V P)
Truth Table:
| P | P V P |
|---|-------|
| T | T |
| F | F |
The truth table shows that regardless of the truth value of P, the proposition (P V P) always evaluates to true. Therefore, (P V P) is a tautology.
2. Validity of the statement "If you study, you will get a good grade. And you studied."
Blank #1: Valid
Blank #2: Satisfiable
The statement is valid because it follows the form of a valid argument. If the first condition (studying) is true, then the second condition (getting a good grade) must also be true. It is satisfiable because there is a scenario where both conditions can be true.
3. Validity of the statement "If you study, you will get a good grade. Or if you get a good grade, then you studied."
Blank #1: Unsatisfiable
Blank #2: Unsatisfiable
The statement is unsatisfiable because it creates a circular reasoning. The first condition implies that studying leads to a good grade, while the second condition implies that a good grade implies studying. This circular reasoning does not provide a meaningful truth value.
4. Validity of the statement "They will win and they will celebrate. And they will not win."
Blank #1: Contradiction
Blank #2: Unsatisfiable
The statement is a contradiction because it states that they will both win and not win simultaneously. It is unsatisfiable because there is no scenario where both conditions can be true at the same time.
In summary:
1. (P V P) is a tautology.
2. Valid, Satisfiable
3. Unsatisfiable, Unsatisfiable
4. Contradiction, Unsatisfiable
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Refer to the following matrices. A= ⎣
⎡
2
−11
8
3
−5
2
0
1
7
8
2
3
−6
7
7
−6
⎦
⎤
B= ⎣
⎡
5
0
5
−1
−1
1
2
0
2
6
1
6
⎦
⎤
C=[ 1
0
5
6
3
]D= ⎣
⎡
1
5
−2
0
⎦
⎤
Identify the square matrix. ≡ is a square matrix. 3
What is its transpose?
The square matrix is A. Transpose is A^T = ⎣
⎡
2
3
−5
7
−11
−5
2
8
8
2
0
7
3
1
1
−6
⎦
⎤
A square matrix is a matrix that has an equal number of rows and columns. In this case, matrix A has dimensions 4x4, meaning it has 4 rows and 4 columns. Therefore, matrix A is a square matrix.
The transpose of a matrix is obtained by interchanging its rows and columns. To find the transpose of matrix A, we simply need to swap its rows with columns. The transpose of matrix A is denoted by A^T.
The transpose of matrix A is:
A^T = ⎣
⎡
2
3
−5
7
−11
−5
2
8
8
2
0
7
3
1
1
−6
⎦
⎤
This means that each element in matrix A is swapped with its corresponding element in the transposed matrix. The rows become columns and the columns become rows.
Therefore, the transpose of matrix A is shown above.
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Vector V 1 is 6.9 units long and points along the negative xxx axis. Vector V 2 is 8.1 units long and points at 30 degrees to the positive x axis.
1. What are the x and y components of vector V1?
Express your answers using two significant figures. Enter your answers numerically separated by a comma.
2. What are the x and y components of vector V2?
Express your answers using two significant figures. Enter your answers numerically separated by a comma.
3. Determine the magnitude of the sum V1+V 2
Express your answer using two significant figures.
4. Determine the angle of the sum V1+V 2
Express your answer using two significant figures.
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The university registration office assigns student IDs by using 5 digits followed by 1 letters. How many different registration IDs do not contain any zeros and No Vowels?
The total number of registration IDs that do not contain any zeros and no vowels is 308520.
The given ID has five digits followed by one letter. The total number of possible registration IDs would be obtained as follows:
Step 1: Find the number of ways to fill each of the five digits of the ID with any of the numbers from 1 to 9, which will be equal to the number of permutations of 5 digits taken from 9 distinct digits.
That is, 9P5 = 9 × 8 × 7 × 6 × 5 = 15120.
Step 2: Find the number of ways to fill the last letter of the ID with any of the 21 consonants of the English alphabet. This would be equal to 21.
Step 3: Multiply the result of step 1 by the result of step 2 to get the total number of registration IDs that can be formed using five digits and one consonant.
That is, 15120 × 21 = 317520.
Step 4: Find the number of registration IDs that have 0 as one of the digits. This can be done as follows:Select one of the five positions for the 0, then fill the remaining four positions with any of the other eight digits.
There are 5 × 8P4 = 5 × 8 × 7 × 6 × 5 = 8400 ways to do this.
Step 5: Find the number of registration IDs that have a vowel as the last letter. This would be equal to 5P1 × 5P4, where the first factor represents the number of ways to select one of the five positions for the vowel and the second factor represents the number of ways to fill the remaining four positions with any of the five vowels.
That is, 5 × 5 × 4 × 3 × 2 = 600.
Step 6: Subtract the results of steps 4 and 5 from the result of step 3 to obtain the total number of registration IDs that do not contain any zeros and no vowels. That is, 317520 − 8400 − 600 = 308520.
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Expand the quotient by partial fraction (6x+2)/ (x^2 - 10x + 24)
Therefore, the expansion of the given quotient into partial fractions is: [tex](6x + 2) / (x^2 - 10x + 24) = -13 / (x - 4) + 19 / (x - 6).[/tex]
To expand the quotient [tex](6x + 2) / (x^2 - 10x + 24)[/tex] into partial fractions, we need to factor the denominator first.
The denominator [tex]x^2 - 10x + 24[/tex] can be factored as (x - 4)(x - 6).
Now, let's express the given quotient in partial fraction form:
[tex](6x + 2) / (x^2 - 10x + 24) =[/tex] A / (x - 4) + B / (x - 6)
To find the values of A and B, we'll multiply both sides of the equation by the common denominator (x - 4)(x - 6):
(6x + 2) = A(x - 6) + B(x - 4)
Expanding the right side of the equation:
6x + 2 = Ax - 6A + Bx - 4B
Now, we can equate the coefficients of like terms on both sides:
For the x terms:
6x = Ax + Bx
This gives us the equation: A + B = 6 (equation 1)
For the constant terms:
2 = -6A - 4B
This gives us the equation: -6A - 4B = 2 (equation 2)
We now have a system of two equations (equation 1 and equation 2) with two unknowns (A and B). We can solve this system to find the values of A and B.
Multiplying equation 1 by 4 and equation 2 by -1, we can eliminate B:
4A + 4B = 24
6A + 4B = -2
Subtracting the second equation from the first:
(4A + 4B) - (6A + 4B) = 24 - (-2)
-2A = 26
Dividing both sides by -2:
A = -13
Substituting the value of A into equation 1:
-13 + B = 6
B = 19
[tex](6x + 2) / (x^2 - 10x + 24) = -13 / (x - 4) + 19 / (x - 6)[/tex]
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2-C: VECTOR ADDITION: Find the sum of two forces: R=A+B, where A=100 N at 30∘ and B=200 N at 120∘, by using the Trianale Method (Analyticall (ean. 3-1 and 3-2).
The sum of two forces, A and B, can be found using the Triangle Method. Force A is 100 N at an angle of 30 degrees, and force B is 200 N at an angle of 120 degrees. By applying the analytical approach (equations 3-1 and 3-2), we can determine the resultant force R.
To find the sum of forces A and B using the Triangle Method, we break down each force into its horizontal and vertical components. For force A, the horizontal component (Ax) can be calculated using the equation Ax = A * cos(θ), where A is the magnitude of force A and θ is the angle it makes with the horizontal axis. Similarly, the vertical component (Ay) can be calculated as Ay = A * sin(θ).
For force B, we follow the same procedure. The horizontal component (Bx) is calculated as Bx = B * cos(θ), and the vertical component (By) is calculated as By = B * sin(θ).
Once we have the horizontal and vertical components for both forces A and B, we can add them separately. The sum of the horizontal components (Rx) is Rx = Ax + Bx, and the sum of the vertical components (Ry) is Ry = Ay + By.
Finally, to find the magnitude of the resultant force R, we use the Pythagorean theorem: R = √(Rx^2 + Ry^2). The angle θr that the resultant force makes with the horizontal axis can be determined using the equation θr = tan^(-1)(Ry/Rx).
By applying these steps and plugging in the given values, we can find the resultant force R and its angle with respect to the horizontal axis.
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The function f(x)=1/2xe^−x is positive and negative on the interval [−1,4]. a. Sketch the function on the given interval. b. Approximate the net area bounded by the graph of f and the x-axis on the interval using a left, right, and midpoint Riemann sum with n=4.
The question asks to sketch the function f(x) = (1/2)xe^(-x) on the interval [-1,4] and approximate the net area bounded by the graph of f and the x-axis using left, right, and midpoint Riemann sums with n=4.
To sketch the function f(x), we can analyze its key characteristics. The function f(x) = (1/2)xe^(-x) is a product of two terms: x/2 and e^(-x). The term x/2 is a linear function with a positive slope, while e^(-x) is an exponential function that is always positive. Therefore, f(x) will be positive on some intervals and negative on others.
On the interval [-1,4], we can observe that f(x) is positive when x<0 and negative when x>0. Thus, the graph of f(x) will start above the x-axis, cross it at some point, and then go below it.
To approximate the net area bounded by the graph of f and the x-axis using Riemann sums, we can use the left, right, and midpoint methods with n=4. In each method, we divide the interval into subintervals of equal width and calculate the sum of the areas of the rectangles formed by the function values and the width of the subintervals.
For the left Riemann sum, we evaluate f(x) at the left endpoints of each subinterval and calculate the sum of the areas of the corresponding rectangles. For the right Riemann sum, we evaluate f(x) at the right endpoints of each subinterval. And for the midpoint Riemann sum, we evaluate f(x) at the midpoints of each subinterval.
By calculating these Riemann sums with n=4, we can obtain approximate values for the net area bounded by the graph of f and the x-axis on the given interval.
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Consider two vectors A :( 50.0 m, 30 0 East of North) and B: (20.0 m, 40 0 North of West)
Represent both vectors in an x-y coordinate system and find the components of vectors A and B.
Express vector C = 5A - (2/3) B as a linear combination of the unit vectors.
Calculate the magnitude and direction of vector C
The x-component of vector A: 25 m. The y-component of vector A: 43.3 m. The x-component of vector B: -9.9 m. The y-component of vector B: 15.5 m.Vector C: (131.6 i + 206.2 j)Magnitude of vector C: 243.1 m. Direction of vector C: 57.3° north of the east.
Given information: Vector A:(50.0m, 30°
East of North)Vector B:(20.0m, 40° North of West)
Vector C = 5A - (2/3)B
Represent both vectors in an x-y coordinate system and find the components of vectors A and B: The angle between vector A and the positive x-axis: (90 - 30) = 60 degrees.
The magnitude of vector A: 50.0 m.
The x-component of vector A: Acosθ = 50cos60° = 25 m.
The y-component of vector A: Asinθ = 50sin60° = 43.3 m.
The angle between vector B and the positive x-axis: (90 + 40) = 130 degrees.
The magnitude of vector B: 20.0 m.The x-component of vector B: Bcosθ = 20cos130° = -9.9 m.
The y-component of vector B: Bsinθ = 20sin130° = 15.5 m.
Express vector C = 5A - (2/3)B as a linear combination of the unit vectors:
Vector C = 5A - (2/3)
B=5(25 i + 43.3 j) - (2/3)(-9.9 i + 15.5 j)= (125 i + 216.5 j) + (6.6 i - 10.3 j)= 131.6 i + 206.2
jMagnitude of vector C:|C|=√((131.6)² + (206.2)²)= 243.1 m
Direction of vector C:θ= tan⁻¹((206.2)/(131.6))= 57.3° north of the east.
Therefore, The x-component of vector A: 25 m.
The y-component of vector A: 43.3 m. The x-component of vector B: -9.9 m.
The y-component of vector B: 15.5 m.
Vector C: (131.6 i + 206.2 j)
Magnitude of vector C: 243.1 m. Direction of vector C: 57.3° north of the east.
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