2 years ago

A goat is tied to a 5m rope. What is the area of the grass he can eat? PLEASE HELP!

1 answer:

6 0

The goat can go in a circle
the rope's length is the radius
area=pir^2
area=pi5^2
area=25pi square meters
if we use pi=3.14
area=78.5 square meters

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Step-by-step explanation:

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c² = a² + b²

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a = 4ft , b = 7ft

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lawyer [7]

Answer:

The standard deviation of the sample mean differences is _5.23_

Step-by-step explanation:

We have a sample of a population A and a sample of a population B.

For the sample of population A, the standard deviation $\sigma_A$ is

$\sigma_A = 17.6$

The sample size $n_A$ is:

$n_A = 25$ .

For the sample of population B, the standard deviation $\sigma_B$ is

$\sigma_B = 21.2$

The sample size $n_B$ is:

$n_B = 30$ .

Then the standard deviation for the difference of means has the following form:

$\sigma=\sqrt{\frac{\sigma_A^2}{n_A}+\frac{\sigma_B^2}{n_B}}$

Finally

$\sigma=\sqrt{\frac{17.6^2}{25}+\frac{21.2^2}{30}}\\\\\sigma= 5.23$

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