Answer:
99.85
Step-by-step explanation:
$99.85\text{ %}$
Notice that 52 inches is three standard deviations less than the mean. Based on the Empirical Rule, 99.7% of the yearly snowfalls are within three standard deviations of the mean. Since the normal distribution is symmetric, this implies that 0.15% of the yearly snowfalls are less than three standard deviations below the mean. Alternatively, 99.85% of the yearly snowfalls are greater than three standard deviations below the mean.
Given: WXYZ is a parallelogram.
ZX WY
Prove: WXYZ is a rectangle
Answer:
Step-by-step explanation:
A quadrilaterals are plane figures bounded by four sides. Examples are; square, rectangle, parallelogram, kite, trapezium etc.
Given: parallelogram WXYZ
ZX ≅ WY
Prove: WXYZ is a rectangle
WZ ≅ XY (opposite sides property)
YZ ≅ WX (opposite sides property)
<WZY ≅ <ZWX ≅ <WXY ≅ <XYZ = [tex]90^{0}[/tex] (angle property of a rectangle)
<YZW ≅ <WXY (opposite angles are congruent)
ΔZYW ≅ ΔXTW (Side-Angle-Side property)
ZX ≅ WY
Therefore, the parallelogram is a rectangle.
Answer: This is the right answer
Step-by-step explanation:
Below
In a study, 43% of adults questioned reported that their health was excellent. A researcher wishes to study the health of people living close to a nuclear power plant. Among 13 adults randomly selected from this area, only 3 reported that their health was excellent. Find the probability that when 13 adults are randomly selected, at most 3 are in excellent health.
Answer:
13.44% probabilith that at most 3 are in excellent health.
Step-by-step explanation:
For each adult, there are only two possible outcomes. Either they are in excellent health, or they are not. The probability of an adult being in excellent health is independent of other adults. So we use the binomial probability distribution to solve this question.
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.
[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]
In which [tex]C_{n,x}[/tex] is the number of different combinations of x objects from a set of n elements, given by the following formula.
[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]
And p is the probability of X happening.
43% of adults questioned reported that their health was excellent.
This means that [tex]p = 0.43[/tex]
13 adults randomly selected
This means that [tex]n = 13[/tex]
Find the probability that when 13 adults are randomly selected, at most 3 are in excellent health.
[tex]P(X \leq 3) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3)[/tex]
In which:
[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]
[tex]P(X = 0) = C_{13,0}.(0.42)^{0}.(0.58)^{13} = 0.0008[/tex]
[tex]P(X = 1) = C_{13,1}.(0.42)^{1}.(0.58)^{12} = 0.0079[/tex]
[tex]P(X = 2) = C_{13,2}.(0.42)^{2}.(0.58)^{11} = 0.0344[/tex]
[tex]P(X = 3) = C_{13,3}.(0.42)^{3}.(0.58)^{10} = 0.0913[/tex]
[tex]P(X \leq 3) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3) = 0.0008 + 0.0079 + 0.0344 + 0.0913 = 0.1344[/tex]
13.44% probabilith that at most 3 are in excellent health.
need asap to get the points plz
the problaty of getting Gray tile is 6 time
Statistical Process Control (SPC) is often described as an applied side of the Binomial, Poisson, and Normal distributions. Many have said that an X-bar control chart is simply a Normal distribution turned on its side. Some argue that our statistics course shouldn't try to cover these applications because they represent an analytical skill rather thana statistical technique. Discuss, first whether or not you agree with the notion that SPC is an application of what we're learning in this class, and second, whether coverage of the topic is helpful in this class. How might your outcomes after this class be affected - positively or negatively - by whether or not we cover Chapter 16 in the text?
Answer: The answer is provided below
Step-by-step explanation:
Statistical Process Control (SPC) is described as the applied side of binomial, poisson, and the normal distributions. It has been often said that an X-bar control chart is a normal distribution that is turned on its side. Some people argue that statistics shouldn’t cover these applications because it represent an analytical skill rather than statistical technique. It's an application of what is learnt on statistics.
Statistical Process Control(SPC) is very useful in our lives. As a statistics student, one should be thorough with every mathematical concepts and its applications.
If f (x )equals left brace Start 2 By 1 Matrix 1st Row 1st Column 2 x minus 3 if minus 2 less than or equals x less than or equals 5 2nd Row 1st Column x cubed minus 5 if 5 less than x less than or equals 6 EndMatrixf(x)= 2x−3 if −2≤x≤5 x3−5 if 5
Answer:
(a)f(0)=-3
(b)f(1)=-1
(c)f(5)=7
(d)f(6)=211
Step-by-step explanation:
[tex]f(x)=\left\{\begin{array}{ccc}2x-3, &-2\leq x \leq 5 \\x^3-5, &5<x\leq6 \end{array}\right[/tex]
(a) f(0)
For x such that , [tex]-2\leq x \leq 5, f(x)=2x-3[/tex]
Since [tex]-2\leq 0\leq 5[/tex]
[tex]f(0)=2(0)-3=0-3\\f(0)=-3[/tex]
(b)f(1)
For x such that , [tex]-2\leq x \leq 5, f(x)=2x-3[/tex]
Since [tex]-2\leq 1\leq 5[/tex]
[tex]f(1)=2(1)-3=2-3\\f(1)=-1[/tex]
(c)f(5)
For x such that , [tex]-2\leq x \leq 5, f(x)=2x-3[/tex]
Since [tex]-2\leq 5\leq 5[/tex]
[tex]f(5)=2(5)-3=10-3\\f(5)=7[/tex]
(d)f(6)
For x such that [tex]5<x\leq6, f(x)=x^3-5[/tex]
[tex]f(6)=6^3-5\\f(6)=211[/tex]
What is the value of x in the equation- x - y = 30, when y= 15?
4
8
80
200
Answer:
x - 15 = 30
x = 45
Step-by-step explanation:
Answer:
D: 200
Step-by-step explanation:
1/5x-2/3 times 15=30
Simplify each term
x/5 -10=30
Move all terms not containing x to the right side of the equation
x/5=40
Multiply both sides of the equation by 5
5 times x/5=5 times 40
Simplify both sides of the equation
x=200
Hope this helped!
Ana purchased a gallon of milk for $2.22, bagels for $2.97, and a box of
cereal for $2.42. How much money did Ana spend in all? Do not include s in
your answer.
Answer:
7.61
Step-by-step explanation:
Sum all of the values
2.22+2.97+2.42=7.61
Answer:
761
Step-by-step explanation:
What is the area of this polygon?
coordinates are -5,2(-2,3)(3,3)(3,-3)(-2,-3)
Enter your answer in the box.
Answer:
30
Step-by-step explanation:
Xavier invests $100 each month for 6 months in an account that pays 6% APR compounded monthly. What is the future value of Xavier's account after 6 months?
Answer:
$607.57
Step-by-step explanation:
Find the surface area of the triangular prism shown below .
Answer:
the surface area should be 544 (whatever the unit is)
Step-by-step explanation:
You start by taking the rectangles on the side and finding their area.
1. (10×14)×2 ←Because there are two rectanglular sides.
2. find the area of the triangles on the side. 1/2bh = area of triangle.
(.5×8×6)×4 ← in order to find the area for all of the triangles.
3. lastly take the base of the prism and find the area then add the previously found values together.
(12×14)+(.5×8×6)×4+ (10×14)×2 = 544
Answer:
544
Step-by-step explanation:
It is right on Khan academy so I hope this helps!!!
The US Department of Agriculture reports that the mean cost of raising a child from birth to age 2 in a rural area is $10,460. A team of economists believes this value is incorrect, so they select a random sample of 900 children (age 2) and find that the sample mean cost is $10,345 with a sample standard deviation of $1540. Is this significantly different than the US Department of Agriculture reports
Answer:
[tex]t=\frac{10345-10460}{\frac{1540}{\sqrt{900}}}=-2.24[/tex]
The degrees of freedom are given by:
[tex]df=n-1=900-1=899[/tex]
The p value for this case would be given by:
[tex]p_v =2*P(t_{(899)}<-2.24)=0.0127[/tex]
The p value is low and if we use a significance level of 0.05 we can reject the null hypothesis and we can conclude tha the true mean is different from 10460
Step-by-step explanation:
Information given
[tex]\bar X=10345[/tex] represent the mean height for the sample
[tex]s=1540[/tex] represent the sample standard deviation for the sample
[tex]n=900[/tex] sample size
[tex]\mu_o =10460[/tex] represent the value to verify
t would represent the statistic
[tex]p_v[/tex] represent the p value for the test
Hypothesis to test
We want to verify if the true mean is equal to 10460, the system of hypothesis would be:
Null hypothesis:[tex]\mu = 10460[/tex]
Alternative hypothesis:[tex]\mu \neq 10460[/tex]
The statistic is given by:
[tex]t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}[/tex] (1)
Replacing the info given we got:
[tex]t=\frac{10345-10460}{\frac{1540}{\sqrt{900}}}=-2.24[/tex]
The degrees of freedom are given by:
[tex]df=n-1=900-1=899[/tex]
The p value for this case would be given by:
[tex]p_v =2*P(t_{(899)}<-2.24)=0.0127[/tex]
The p value is low and if we use a significance level of 0.05 we can reject the null hypothesis and we can conclude tha the true mean is different from 10460
The function g(x) = x^3 has the point(-3, -27) on its graph. Determine g(3) without using substitution. What is the output based on the eve/odd nature of the function?
-27
27
not enough information
Answer:
27
Step-by-step explanation:
Any positive integer to 3rd power will have positive answer.
Odd functions with number next to x^3 that is positive are increasing from left to right and thay also have a rotational symmetry with respect to the origin.Whe you put this together it's clear that the answer is 27
What is the product?
2x(x-4)
2x2-4
O 2x2-8
2x2 - 4x
B
2x2-8x
Answer:
2x^2 -8x
Step-by-step explanation:
2x(x-4)
Distribute
2x*x -2x*4
2x^2 -8x
The right answer is 2x^2-8x
please see the attached picture for full solution
Hope it helps
good luck on your assignment
Consider the function.
f(x) = -x-24
Which conclusions can be drawn about f'(x)? Select two options.
F1(x) has a slope of -
f'(x) has a restricted domain.
f(x) has a y-intercept of (0, -36).
F'(x) has an x-intercept of (-36,0).
f'(x) has a range of all real numbers.
Answer:
f(x) has a slope of -1 and has a range of all real numbers.
Step-by-step explanation:
A linear function is a continuous function, so that exist a range value for all value of the domain, which corresponds to all real numbers. Regarding the function described above, the y- and x-intercepts are, respectively:
x-Intercept
[tex]0 = - x-24[/tex]
[tex]x = -24[/tex]
f(x) has a x-intercept of (-24,0).
y-Intercept
[tex]f(x) = 0 - 24[/tex]
[tex]f(x) = -24[/tex]
f(x) has a y-intercept of (0, -24).
Lastly, the linear function has a slope of -1.
Answer:
D AND E
Step-by-step explanation:
edu I took it
Brady and JaQuan were selling cupcakes together at a bake sale. They hope to make $100 so they can both go on the band field trip to New York City. In the first hour Brady sold 1/3 of the cupcakes and Jaquan sold 3/8...
Answer:
The initial amount of cupcakes = 48
If they sold each cupcake for $2.75, they would make $132 which is more than the required $100 to go on band field trip to New York.
The excess money available for spending is thus $32
Step-by-step explanation:
The complete question is presented in the attached image to this answer.
They need to make $100
Let x be the initial amount of cupcakes
During the first hour, Brady sold (1/3) of the cupcakes and Jaquan sold (3/8)
Total amount of cupcakes sold in the first hour = [(1/3) × x] + [(3/8) × x] = (17x/24)
Amount of cupcakes remaining after the first hour = x - (17x/24) = (7x/24)
After the first hour, they sold 2 cupcakes
Amount of cupcakes left after the first hour = (7x/24) - 2 = (0.292x - 2)
During the second hour, they sold 75% of the remaining cupcakes, meaning they had 25% of the remaining cupcakes left.
Amount of cupcakes left = 25% × (0.292x - 2)
= (0.07292x - 0.5)
During the third hour, they sold the remaining 3 cupcakes
Meaning that the amount of cupcakes left from the second hour = 3
(0.07292x - 0.5) = 3
0.07292x = 3.5
x = (3.5/0.07292) = 47.998 = 48 cupcakes.
Hence, the initial amount of cupcakes = 48.
If they sold each cupcake for $2.75, they would make 2.75 × 48 = $132
Which is more than the required $100 to go on band field trip to New York.
The excess money available for spending is thus $132 - $100 = $32.
Hope this Helps!!!
When a group of five hundred exchange students were questioned over a decade after their study abroad experience, over 90 percent said that the experience was a key influence on the direction of their lives. Which reason should Mariah include to support to her claim that study abroad programs should be instituted in high schools across the country?
Answer:
over 90 percent said that the experience was a key influence on the direction of their lives.
Step-by-step explanation:
This is the most helpful reason to implement study abroad programs in high schools.
Answer:
C
Step-by-step explanation:
i took the test
f(x) = x2 - x - 1
What is the average rate of change of f over the interval -1 < x < 1?
Answer:
-1
Step-by-step explanation:
The average rate of change is the ratio of the difference in y-values to the difference in x-values of corresponding points.
At x=-1, f(x) = (-1)^2 -(-1) -1 = 1
At x=1, f(x) = (1)^2 -(1) -1 = -1
So, points on the graph are (-1, 1) and (1, -1).
Then the change in y over that interval is -1 -1 = -2.
The change in x over that interval is 1 -(-1) = 2.
The average rate of change is ...
∆y/∆x = -2/2 = -1 . . . . average rate of change on (-1, 1)
The shaded region below is called an annulus sector. Calculate the area (in square feet) of the shaded region if the inner circle has radius 7 ft and the outer circle has radius 14 ft. Round your answer to the nearest square foot.
Answer:
462 ft²
Step-by-step explanation:
The area of the annulus sector is given by the area of the outer circle (radius of 14 ft) minus the area of the inner circle (radius of 7 ft).
The area of a circle is:
[tex]A=\pi r^2[/tex]
Therefore, the area of the annulus sector is:
[tex]A_A=A_O-A_I\\A_A=\pi*14^2-(\pi*7^2)\\A_A=147\pi\\A_A= 462\ ft^2[/tex]
The area, rounded to the nearest square foot, is 462 ft².
What is the number of possible permutations of 6 objects taken 3 at a time?
Answer:
120
Step-by-step explanation:
A car is traveling at a speed of 63 kilometers per hour. What is the car's speed in kilometers per minute? How many kilometers will travel in 5 minutes?
Answer:
5.25 kilometers
Step-by-step explanation:
63k/60 = 1.05k
1.05k x 5 = 5.25k
Solve the inequality 7x ≥ –7
Answer:
x ≥ -1
Step-by-step explanation:
Divide everything by 7 to isolate x and you have your answer!
Answer:
x ≥ –1
Step-by-step explanation:
7x ≥ –7
Divide by 7
7x /7≥ –7/7
x ≥ –1
What are the coordinates of the pre-image of B'?
O (2, -8)
O (-8, -2)
O (-2, 8)
O (8,2)
Answer:
b. (-8, -2)
Step-by-step explanation:
Reflection across the x-axis
(x, y) ---> (x, -y)
B'(- 8, 2) ---> B( - 8, -2)
The coordinates of the pre image of B is (-8,-2) by studying the given graph.
How to find reflected coordinates of B'The given figure ABCD is reflected across the x-axis to create the figure A'B'C'D'.
By referring the graph we can say that the coordinate of B' is (-8,2)
The reflected point will have y coordinate's sign changed as the figure is reflected across x-axis.
Thus the pre image of B' will be (-8,-2)
Hence the coordinates of the pre image of B' is (-8,-2)
Learn more about coordinate system here:
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Fernando bought a jacket for 185 and sold it for 1 1/2 what he paid. Marisol spent 1/5 as much as Fernando on the same jacket but sold it for 1/2 as much as Fernando. How much money did Marisol make?
Answer:
Marisol made $138.75 on the sale of the jacket
Step-by-step explanation:
First we are told that Fernando bought a jacket for $185, and sold it for 1 1/12 what he paid.
Therefore, 1 1/2 of 185;
= 1.5 × 185 = $277.5
Therefore, Fernando sold the Jacket for $277.5
Next, we are told that:
Marisol spent 1/5 as much as Fernando on the same jacket
This means that Marisol spent 1/5 of $185 on the jacket
= 1/5 × 185 = 0.2 × 185 = $37
Therefore, Marisol spent $37 to buy the same jacket
Next, Marisol sold the jacket for 1/2 as much as Fernando. Since Fernando sold the Jacket for $277.5, Marisol sold the jacket for 1/2 of 277.5, and this is calculated as:
1/2 of 277.5 = 0.5 × 277.5 = 138.75
Therefore, Marisol made $138.75 on the sale of the jacket.
Simplify the radical expression √100/2
Answer: 5
Step-by-step explanation:
sqrt of 100 = 10
10/2 = 5
The profit a company makes from producing x tabletops is modeled by the equation p(x) = 480x minus 2x squared. For what number of tabletops does the company need to make a profit of zero dollars?
Answer:
240 table tops or none
Step-by-step explanation:
p(x) = 480x- 2x^2
For profit to be 0, it means;
p(x)= 0
Therefore 480x- 2x^2 = 0
Dividing through by 2 we have ;
240x - x^2 = 0
By factorisation of x we have ;
(240-x) x = 0
x = 0 or 240-x= 0; x= 240( by moving x to the right of the expression:240-x= 0; we have 240=x => x=240).
So the company needs to produce 240 table tops or none in order not to make a profit.
The company need to make a profit of zero dollars will be 240.
What is a profit?A monetary profit, particularly the distinction between the amount gained and the actual cost of purchasing, running or creating anything.
The profit a company makes from producing x tabletops is modeled by the equation is given as,
p(x) = 480x – 2x²
Then the company need to make a profit of zero dollars will be
p(x) = 0
480x – 2x² = 0
2x(240 – x) = 0
x = 0, 240
More about the profit is given below.
https://brainly.com/question/15036999
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What is the value of x in the equation
5x - y = 30, when y = 157
Answer:
x = 37.4
Step-by-step explanation:
Answer:
37.4
Step-by-step explanation:
If you plug in 157, we get 5x-157=30. Then we will add 157 to both sides to get 5x=187 and then divide by 5 on both sides leaving x on one side and the answer on the other so, 187/5=37.4.
Hope this helps!!! PLZ MARK BRAINLIEST!!!
Factor 4x^2+20x-24 into bionomials
Answer:
4( x+6) (x-1)
Step-by-step explanation:
4x^2+20x-24
Factor out the greatest common factor
4(x^2 +5x-6)
What 2 numbers multiply to -6 and add to 5
6*-1 = -6
6+-1 = 5
4( x+6) (x-1)
Answer:
[tex]4(x-1)(x+6)[/tex]
Step-by-step explanation:
→Take out the GCF (Greatest Common Factor), which is 4:
[tex]4x^2+20x-24[/tex]
[tex]4(x^2+5x-6)[/tex]
→Split the middle term into two numbers that can be added to get 5 and multiplied to get 6:
[tex]4(x-1)(x+6)[/tex]
The distribution of the amount of change in UF student's pockets has an average of 2.02 dollars and a standard deviation of 3.00 dollars. Suppose that a random sample of 45 UF students was taken and each was asked to count the change in their pocket. The sampling distribution of the sample mean amount of change in students pockets is
Answer:
[tex] \bar X \sim N (\mu ,\frac{\sigma}{\sqrt{n}})[/tex]
Then the mean would be:
[tex] \mu_{\bar X}= 2.02[/tex]
And the deviation:
[tex] \sigma_{\bar X}= \frac{3.00}{\sqrt{45}}= 0.447[/tex]
And the distribution would be given by:
[tex] \bar X \sim N(2.02, 0.447)[/tex]
Step-by-step explanation:
For this case we can define the variable of interest X as the amount of change in UF student's pockets and we know the following parameters:
[tex] \mu = 2.02, \sigma =3.00[/tex]
And we select a sample of n=45. Since this sample size is higher than 30 we can apply the central limit theorem and the distirbution for the sample size would be given by:
[tex] \bar X \sim N (\mu ,\frac{\sigma}{\sqrt{n}})[/tex]
Then the mean would be:
[tex] \mu_{\bar X}= 2.02[/tex]
And the deviation:
[tex] \sigma_{\bar X}= \frac{3.00}{\sqrt{45}}= 0.447[/tex]
And the distribution would be given by:
[tex] \bar X \sim N(2.02, 0.447)[/tex]
A new car is purchased for 15100 dollars. The value of the car depreciates at 12.25% per year. To the nearest year, how long will it be until the value of the car is 2300 dollars?
Answer: 14
Step-by-step explanation:
Can someone please help me :)
Answer:
90 degree
Step-by-step explanation:
Three points A, B, and C are added and shown in attached picture.
As the property of inscribed angle in circle:
angle BAC = (1/2) x 88 = 44 deg
As the property of complement angle:
angle ABC = 180 - 89 = 91 deg
As the property of sum of three angles in a triangle:
angle ACB + angle ABC + angle BAC = 180 deg
=> angle ACB = 180 - angle ABC - angle BAC = 180 - 44 - 91 = 45 deg
One more time, we use the property of inscribed angle in circle:
x = 2 x angle ACB = 2 x 45 = 90 deg
Hope this helps!
