Answer:
48
Step-by-step explanation:
The significance level is 95%
Z-alpha/2 = 1.96 at 0.05 from the standard normal distribution table.
The standard deviation has been given to be 7
Margin of error is 2
We solve further using the formula:
n = (z-alpha/2 * sd/ME)²
n = (1.96 * 7/2)²
n = (1.96x3.5)²
= 6.86²
= 47.0596
This is approximately
n = 48
So the sample size they should be selected should be 48 for at 95% confidence level.
Neil buys a refrigerator that costs him $995 plus a 9.3% sales tax rate. what is the sales tax of the retail purchase. round to two decimal place
Answer:
$92.54
Step-by-step explanation:
sales tax = cost * tax rate
= 995 * .093
= 92.535
2.9 months to 4.9 months
Answer:
2 months difference
Step-by-step explanation:
4.9-2.9=2
Which points are solutions to the equation y=3x+5?
(2,11)
(7,16)
(−7,−16)
(−2,1)
(−3,−1)
Seven more than a number is less than or equal to -18
Answer:
7+x<=-18
subtract 7 from both sides
x<=-25
Step-by-step explanation:
The equation is 7+x<=-18 and the value of x = -25.
Given that,
Seven more than a number is less than or equal to -18Based on the above information, the calculation is as follows:
7+x<=-18
x = -25
Learn more: https://brainly.com/question/12522729?referrer=searchResults
jeatofine anwser me 48 divided by2 (9+3) =
Answer:
2
Step-by-step explanation:
48/2(9+3)
=48/2(12)
=48/24
=2
hope this helps
plz mark as brainliest
Answer:
The answer is 2 Have a blessed and safe day
If 23 is a subtract from a number, the result is -8. Find the numbers
Answer:
15
Step-by-step explanation:
Step 1:
x - 23 = - 8 Equation
Step 2:
x = - 8 + 23 Add 23 on both sides
Answer:
x = 15
Hope This Helps :)
Jordan and Micheal are planing a graduation party with 45 guests. They want to seat an equal number of guests at each table.Each table should have more than one guest.List te different ways the guests and tables could arranged. Tell how many tales are needed for each group of guests. guests at each table.Each table should have more than one guest.List different ways the guests and tables
Answer:9 tables with 5 people at each one
Step-by-step explanation:
Using the factorization that defines the arrangement, there can be 9 tables for 45 guests with 5 guests per table. "A large number is factorised, which is the process of breaking it down into smaller numbers that, when multiplied together, produce the original number. A number is factorised when it is divided into its factors or divisors."
What is factorization?The breaking or decomposition of an entity (such as a number, a matrix, or a polynomial) into a product of another entity, or factors, whose multiplication results in the original number, matrix, etc., is known as factorization or factoring in mathematics. The Grouping method, the Difference in Two Squares, the Sum or Difference in Cubes, and the Greatest Common Factor (GCF) are the four main methods of factoring. Divide a number by the smallest prime number (larger than 1) that divides it evenly and leaves no remainder to find its factors quickly. As you receive more numbers, repeat this procedure until you reach 1.
Here,
Jordan and Micheal are planing a graduation party with 45 guests. They want to seat an equal number of guests at each table.Each table should have more than one guest.
when we factorize 45,
1x45
3x15
5x9
We can arrange in the order of 5 guest on each table and their can be 9 tables for 45 guests using the factorization that defines "Factorization is the process of dividing a large number into smaller ones that, when multiplied together, yield the original number. Factorization is the division of a number into its factors or divisors."
To know more about factorization,
https://brainly.com/question/14452738?referrer=searchResults
#SPJ2
What is the value of 2^0 in standard form
Answer:
1
Step-by-step explanation:
Anything raised to 0 is 1.
Please help! Find what the value of y is for each one. The value for x is given already. (Picture included)
Worth 30 points! :)
Ok. My answer I came up with is:
y=2-3x
Thanks
You don’t have to explain just give me the answers for these few questions please asap
Answer:
lol do u r own work this is for help no the answers
Step-by-step explanation:
Answer:
same thing you did to me bud
Answer: wheidofnnndbxkdiwijsng Step-by-step explanation: Sorry I needed points
Write an equation of the line with the given slope, m, and y-intercept (0,b).
m= 3, b=7
Answer:
The equation would be y=3x+7. Please mark as helpful if it helps, thanks!
Can you guys please help me out
Answer:
18
Step-by-step explanation:
xy = x times y
in our case, it is 6 times 3
so 18
write an integer for the situation.
Ascend 50 feet
Answer:
50 ft
Step-by-step explanation:
An integer is a whole number.
If you're Ascending that means to go up( or to increase in height. This means that the number would be positive. The 50 feet would give us our number, so our answer is (+) 50 ft.
what is the answer to this equation?? (-3)^2=( )( )=
Answer: 9
I did (-3)^2= cause I'm not sure if you meant to put ( ) ( ) in it. If you did well, sorry. I got (-3)^2=9.
The amount of force needed to keep a 0.5 kg baseball moving at a constant speed of 4 m/s on frictionless ice is
Answer: 0 N
Step-by-step explanation:
Question 9
Solve the equation.
4^(12 - 2x) = 256
O {4}
O {64}
O {6}
{-4}
Answer:
The answer is 4
Step-by-step explanation:
If this helps may i plz have brainliest :)
How to do this problem? Please explain this in steps if possible. Thanks!
Answer: 10
Step-by-step explanation:
If two triangles are congruent, then they will have the exact same sides and angle measures.
AB=3x+1
BC=6
DE=2x
Solve for X by making 2x=6 because DE and BC are corresponding sides, indicating they are equal.
x=3, plug that in
AB=10
How many solutions exist for the given equation?
12(x - 5) = 16 (x - 5)
One
two
zero
Infinitely many
Quarter 1 Benchmark / 3 of 25
The diagram below is a scale drawing of a store, with the scale 1 in. = 16 feet.
4 inches
inches
3 inches
K2 inches -
What is the approximate area of the store in square feet?
O A 2.200
O B. 2,500
OC. 2,300
OD. 2,400
you’ve have by the end of today (12am)
Answer:
B. 2,500
Step-by-step explanation:
The diagram of the area of the store has been divided A and B as shown in the attachment below.
Dimensions of A:
(*Note: scale = 1 in to 16 ft)
Length = 4 inches
Actual length = 4*16 = 64 ft
Width = 1¾ inches
Actual width = 1¾*16 = 28 ft
Area of A = length * width = 64*28 = 1,792 ft²
Dimensions of B:
(*Note: scale = 1 in to 16 ft)
Length = 2¼ inches
Actual length = 2¼*16 = 36 ft
Width = 3 inches - 1¾ inches = 1¼ inches
Actual width = 1¼*16 = 20 ft
Area of A = length * width = 36*20 = 720 ft²
Area of the store = area of A and area of B = 1,792 + 720 = 2,512 ft²
Approximately, the are is 2,500 ft²
Rectangle DEFG with vertices D(-2, 7), E(2, 3), F(0, 1), and G(-4, 5):
a) translation along the rule (x,y) → (x+6, y-8)
b) reflection in the y-axis
D'(_, _)
E'(_, _)
F'(_, _)
G'(_, _)
Answer:
D' (-4, -1)
E' (-8, -5)
F' (-6, -7)
G' (-2, -3)
Step-by-step explanation:
To solve this each point would go under this:
(x, y) --> (-1(x + 6), y - 8)
the x + 6 and y - 8 are the transformation. The -1 multiplied by x represents the reflection over the y-axis
D --> D':
(-2, 3) --> (-4, -1)
E -- E':
(2, 3) --> (-8, 5)
F --> F':
(0, 1) --> (-6, -7)
G --> G':
(-4, 5) --> (-2, -3)
Elaine bought a total of 15 shirts and pairs of pants. She bought 7 more shirts than pants. How many of each did she buy? HELP
Answer:
7 shirts 8 pairs of pants
Step-by-step explanation:
:(
:)
Answer:
8 pants, and 7 shirts
Step-by-step explanation:
because there are only two factors in here, you can just subtract:
15-7=8
can i get brainliest please?
what is an equation in point-slope form of the line that passes through the point (4,-1) and has a slope of 6
Answer:
y = 6x + (-1) or y = 6x - 1
Step-by-step explanation:
y = mx + b
M = Slope = 6
B = y-intercept = -1
what do i fill out in empty space :/?
Step-by-step explanation:
It is a ratio so it will be
3:2
1: .67
Is there a calculator for long-division that'll show you how the problem is done (ie breaking it down) instead of just answering?
Answer:
A website that sometimes shows breaking down long division is m a t h w a y
Step-by-step explanation:
Four gallons of gasoline cost $14.
A customer will get
gallon for $3.50.
A customer will get
gallons for $7.00.
A customer will get
gallons for $14.00.
A customer will pay $
for 6 gallons.
Answer:
A customer will get 1 gallon for $3.50.
A customer will pay $ 21 for 6 gallons.
A customer will get 4 gallons for $14.00.
A customer will get 2 gallons for $7.00.
Step-by-step explanation:
This is solved using the unitary method .
Four gallons cost $ 14
1 gallon costs $ 14/4= $ 3.5
6 gallons cost = $ $ 14/4 *6= $ 21
2 gallons cost = $ 14/4 *2= $14/2= $ 7
A customer will get 1 gallon for $3.50.
A customer will pay $ 21 for 6 gallons.
A customer will get 4 gallons for $14.00.
A customer will get 2 gallons for $7.00.
This can be found out by using the direct ratio as well.
Gallons Cost
4 $14
1 x
Using cross product
x*4= $ 14*1
x= $ 14/4 = $3.5
The same can be applied to find the rest and we get the same answers.
What is the value of x?
Enter your answer in the box.
x = ____
Answer:
X=32
Step-by-step explanation:
since it is equilateral, all the angles are the same so they equal 60 , because those are the only possible angle measurements that an equilateral triangle can have.
we know that all the angles are equal to 60 so we set up an equation
2x-4=60
2x=64
x=64/2
x=32
B
m2
= 540
(4.x - 10)
(2x + 7)
(741-25)
Answer:2=540(4x-10)(2x+7)(741-25)
Step-by-step explanation:
Coliform bacteria are distributed in a river at an average concentration of 1 per 20 cc of water. If we draw from the river a test tube containing 10cc of water, what is the probability that the sample contains exactly 2 coliform bacteria
Answer:
0.5
Step-by-step explanation:
Given that: An average concentration of 1 coliform bacteria per 20 cc of the river water.
This implies that in 20 cc of the water, it is certain that 1 coliform bacteria would be found. So that:
pr(1 bacteria in 20 cc of water) = 1
i.e the probability of getting 1 bacteria in 20 cc of water is 1.
The probability of the 10 cc sample of water containing 2 coliform bacteria can be determined as:
pr(2 bacteria in 10 cc of water) = [tex]\frac{1}{2}[/tex]
= 0.5
The number of road construction projects that take place at any one time in a certain city follows a Poisson distribution with a mean of 3. Find the probability that exactly four road construction projects are currently taking place in this city.
Answer:
The probability that exactly four road construction projects are currently taking place in this city is 0.168.
Step-by-step explanation:
Let X denote the number of road construction projects that take place at any one time in a certain city.
It is provided that X follows a Poisson distribution with parameter λ = 3.
Then the probability mass function of X is:
[tex]p_{X}(x)=\frac{e^{-\lambda}\cdot \lambda^{x}}{x!};x=0,1,2,3...[/tex]
Compute the probability that exactly four road construction projects are currently taking place in this city as follows:
[tex]P(X=4)=\frac{e^{-3}\cdot 3^{4}}{4!}[/tex]
[tex]=\frac{0.04979\times 81}{24}\\\\=0.16804125\\\\\approx 0.168[/tex]
Thus, the probability that exactly four road construction projects are currently taking place in this city is 0.168.
Using the Poisson distribution, it is found that there is a 0.1954 = 19.54% probability that exactly four road construction projects are currently taking place in this city.
We have only the mean for the discrete distribution, hence, the Poisson distribution is used.
Poisson distribution In a Poisson distribution, the probability that X represents the number of successes of a random variable is given by:[tex]P(X = x) = \frac{e^{-\mu}\mu^{x}}{(x)!}[/tex]
The parameters are:
x is the number of successes e = 2.71828 is the Euler number [tex]\mu[/tex] is the mean in the given interval.In this problem, the mean is of 3, hence [tex]\mu = 3[/tex].
The probability that exactly four road construction projects are currently taking place in this city is P(X = 4), hence:
[tex]P(X = 4) = \frac{e^{-3}3^{4}}{(4)!} = 0.1954[/tex]
0.1954 = 19.54% probability that exactly four road construction projects are currently taking place in this city.
You can learn more about the Poisson distribution at https://brainly.com/question/13971530
PLSSS I GIVE 60 POINTSSS
