Answer:
<u>Problem A</u>
5 * 5 * x * x * x

<u>Problem B</u>
8 * 8 * 8

<u>Problem C</u>
4 * 4 * 4 * x * x * x * x

Place an imaginary dot at 0,0. after that go five lines to the right, then 3 lines down. That spot would be at 5,-3.
91 ! just use a calculator or do it by hand
The table was being sold at $450 yesterday