Please answer this question to the best of your ability. You are welcome to re-watch parts of any of the videos to help you.

Suppose you want to determine the maximum area of an isosceles triangle that has a
perimeter of 30 inches (see the image below). Which function would you need to
differentiate (in terms of a single variable)?

A company wants to fence a rectangular storage area consisting of three separate
compartments of equal size (see the image below). The fencing costs $3.00 per linear
foot and the company has a budget of $180 for building the storage area. Find
the length (l) and width (w) of the storage area that maximizes the total
area.

and