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1 year ago

A crew of highway workers paved 1/5 mile in 1/8

1 answer:

6 0

Answer: 2/5 Step-by-step explanation: The easiest approach is to realize that one hour is 3 times longer than 20 minutes. The longer the time, the more they will pave.

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Find the volume of a cylinder that has a radius of 5 inches and a height of 3 inches

Over [174]

Answer:

235.5 cubic inches

Step-by-step explanation:

The volume of a cylinder is found using the volume formula $V=\pi r^2h$ .

Substitute h=3 and r = 5.

$V = \pi r^2h\\V = \pi (5^2)(3)\\V=\pi *25*3\\V = 75\pi \\V= 235.5$

6 0

2 years ago

An IQ test is designed so that the mean is 100 and the standard deviation is 12 for the population of normal adults. Find the sa

Julli [10]

Answer:

Step-by-step explanation:

Given that IQ mean is 100 and std dev = 12 for normal adults

$Confidence level =90%\\Z critical value = 1.645\\Margin of error = 2\\Margin of error = 1.645* std error =2\\Std error = 1.216$

Std error = $\frac{12}{\sqrt{n} } =1.216$

$n=(\frac{12}{1.216} )^2 =97.38$

i.e. sample size should be atleast 97

The required sample size is 97.

This is reasonable as this is greater than 30

Yes. This number of IQ test scores is a fairly large number.

5 0

2 years ago

Mark is solving the following system.

fredd [130]

I think its he didnt eliminate the same variables

6 0

3 years ago

Read 2 more answers

A line that includes the point (-3,-4) and (-4,f ) has a slope of 6. What is the value of f?

Eduardwww [97]

Answer:

f = -10

( -3, -4) ( - 4 , -10)

Step-by-step explanation:

Formula for slope

m =( y_2 - y_1)/(x _2 - x _1)

m = 6

6 = (y_2 - y_1) / (x _2 - x_1)

Substitute the points

( -3 , -4) ( -4 , f)

x_1 = -3

y_1 = -4

x_2 = -4

y_2 = f

Insert the values into

6 = (y_2 - y_1) / (x_2 - x_1)

6 = (f - (-4))/ ( -4 - (-3)

6 = ( f + 4)/ ( -4 + 3)

Cross multiply

6 ( -4 + 3) = f + 4

6 ( -1) = f + 4

-6 = f + 4

-6 - 4 = f

f = -6 - 4

f = -10

( -3 , -4) ( -3 , f)

The value of f is -10

( -3 , -4) ( -3 , -10)

8 0

3 years ago

How do I get the answer for exponents? Please explain step by step to get marked!

ioda

Answer:

4900

Step-by-step explanation:

70^2 means 70*70

70*70=4900

3 0

2 years ago

Read 2 more answers