The question is:

A rectangle has a base on the x-axis and it's lower two vertices on the parabola y=x^2-16
A.) Express the Area, A, of the rectangle as a function of x.
B.) Express the Perimeter, P, of the rectangle as a function of x.

Thank you so much!! I know it's understandable, just need some help. Thank you!

Hi, Battleaxe!

If you post the work that you've already done on the problem, it's likely that someone very knowledgeable concerning what you're asking, will come along to help you.

But, you do need to post the work that you've already done first in order to solve the problem that you're trying to solve.

Thanks!