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2 years ago

I WILL GIVE BRAINLYIST A square is shown below. Which expression can be used to find the area, in square units, of

Mathematics

1 answer:

NeX [460]2 years ago

7 0

I believe it’s the second option sorry if I’m incorrect

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Shelly biked 21 miles in 4 hours. What is shellys average speed in miles per hour? At the same rate how many hours will it take

tekilochka [14]

21 divide by 4 is 5.25. She travels 5.25 miles per hour. 42 divide by 5.25 is 8. It would take 8 hours for Shelly to bike 42 miles.

6 0

3 years ago

Read 2 more answers

Use the given information to find the minimum sample size required to estimate an unknown population mean μ.

larisa86 [58]

Answer:

The number of business students that must be randomly selected to estimate the mean monthly earnings of business students at one college is 64.

Step-by-step explanation:

The (1 - α) % confidence interval for population mean is:

$CI=\bar x\pm z_{\alpha/2}\ \frac{\sigma}{\sqrt{n}}$

The margin of error for this interval is:

$MOE= z_{\alpha/2}\ \frac{\sigma}{\sqrt{n}}$

The information provided is:

σ = $569

MOE = $140

Confidence level = 95%

α = 5%

Compute the critical value of z for α = 5% as follows:

$z_{\alpha/2}=z_{0.05/2}=z_{0.025}=1.96$

*Use a z-table.

Compute the sample size required as follows:

$MOE= z_{\alpha/2}\ \frac{\sigma}{\sqrt{n}}$

$n=[\frac{z_{\alpha/2}\times \sigma}{MOE}]^{2}$

$=[\frac{1.96\times 569}{140}]^{2}\\\\=63.457156\\\\\approx 64$

Thus, the number of business students that must be randomly selected to estimate the mean monthly earnings of business students at one college is 64.

4 0

3 years ago

The female lion at a zoo weights 190 pounds more than female cheetah.Let c represent the weight in pounds of the cheetah.Wright

garri49 [273]

Answer:

c + 190 = Weight of the lion

Step-by-step explanation:

6 0

3 years ago

Scilla [17]

Answer:

124.51%

Step-by-step explanation:

In this problem, we are expected to solve for the percentage change, given the opening point and the closing point

given that the low is 4014

and the high is 9012

the formula to calculate the percentage change is given as

%change= (high-low)/low*100

substituting our given data we have

%change= (9012-4014)/4014*100

%change= (4998)/4014*100

%change= (1.2451)*100

%change= 124.51%

The total change in the stock market from the beginning of the day to the end of the day is 124.51%

hope this helps

sorry if wrong

#Virgo2007

4 0

3 years ago

Simplify the following expression using the distributive property: 2x(y+ 3xy + 4x + 3)

Sidana [21]

6 x 3 y − 9 x 3 y 2 + 12 x 4 y 3

Step-by-step explanation:

I've had this before

8 0

3 years ago