The answer is sampling convenience. I am super sure.
The volume of a pyramid is the area of the base times the height all over 3. Then the answer is:
(65 * 65 * 19.4)/3
81965/3 is approximately:
27321.6666666667
Hope that helped
Answer: d. 1.3333
Step-by-step explanation:
We know that the standard error of a sampling distribution is given by :-
, where
= Population standard deviation.
n= Sample size.
AS per given , we have
n=81
Then, the standard error of a sampling distribution with a population standard deviation of 12 and the sample size of 81 will be :-

Hence, the standard error of a sampling distribution with a population standard deviation of 12 and the sample size of 81 is 1.3333.
Thus the correct answer is d. 1.3333 .