The moment generating function (mgf) of y is given by

Since the momoent generating function of x is given by

When p tends to 0, we have

Applying L'Hopital's rule we have:

This shows that y converges to <span>a chi squared random variable with 2r degrees of freedom</span>.
You plug in each of the 3 numbers as x so the table should have 3,5,8 as x and whatever you get for y for each one is your answer. I saw that you posted this 2 days ago, so you probably don't need help XD
Diameter is the radius times 2, which is 18. 18 x 24 = 432 yards
6,612 is the answer because all you need to do is combine them by their place value.
The answer is B. I hope this helped :)