Answer:
c. Cos 52 = 17/c
Step-by-step explanation:
sin(x) = cos(90-x)
First lets get the formula for a triangular prism

First lets plug in our numbers

It really doesnt matter how you multiply everything, but you end up with 119cubic feet.
Divide the amount of commission made by the total sale, then multiply the decimal answer by 100 for the percent:
175 / 5212 = 0.03357
0.03357 * 100 = 3.357%
Round the answer as needed.
I would go with D, it looks like it is the most linear out of the rest, Hope it helps:)