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3 years ago

How do you solve square roots with fractions

1 answer:

3 0

First, you have to get rid of the square root and in order to do that you get rid of the radical by going to the power of 2 or "squared"

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A letter to europe from the united states costs $0.80 to mail. a letter mailed within the united states cost $0.37. nancy mails

densk [106]

She only sen 2 to Europe.

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3 years ago

An automobile manufacturer claims that its van has a 40.3 miles/gallon (MPG) rating. An independent testing firm has been contra

vovikov84 [41]

Answer:

The value of the test statistic is -2.64.

Step-by-step explanation:

The test statistic is:

$t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

In which X is the sample mean, $\mu$ is the expected(claimed) mean, $\sigma$ is the standard deviation and n is the size of the sample.

An automobile manufacturer claims that its van has a 40.3 miles/gallon (MPG) rating.

This means that $\mu = 40.3$

After testing 250 vans, they found a mean MPG of 39.9. Assume the standard deviation is known to be 2.4.

This means, respectively, that:

$n = 250, X = 39.9, \sigma = 2.4$

$t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

$t = \frac{39.9 - 40.3}{\frac{2.4}{\sqrt{250}}}$

$t = -2.64$

The value of the test statistic is -2.64.

7 0

2 years ago

A circle has circumference of 20.7cm. What is the area of the circle? Using 3.14

Alex787 [66]

Circumference=2pi*r
20.7=2pi*r
r=3.296 or 3.3
A=pir^2
a=34.1946 or about 34.19

4 0

3 years ago

Read 2 more answers

Solve for x 5x+7=9x-25

Svetlanka [38]

Subtract 7 both sides
Subtract 9x both side
They cancel out
At the end you divide it
I don’t have access to paper right now sorry

6 0

3 years ago

Read 2 more answers

Math problem plz help

Firlakuza [10]

Answer:

5/2 x 1/2

Step-by-step explanation:

when you multiply fractions you multiply trait across meaning you do 5*1 and 2*2 which leaves you with 5/4 and that is equivalent to 1 &1/4

5 0

3 years ago