algebra
posted by ana .
A man wants to build a rectangular pen in which to keep his dog. If he uses one side of his barn, what is the maximum area that he can enclose with 80 meter of fencing?

I just did this. Please don't repeat questions.
posted by ana .
A man wants to build a rectangular pen in which to keep his dog. If he uses one side of his barn, what is the maximum area that he can enclose with 80 meter of fencing?
I just did this. Please don't repeat questions.