Question

Suppose you have 54 feet of fencing to enclose a rectangular dog pen. The function , where x = width, gives you the area of the dog pen in square feet. What width gives you the maximum area? What is the maximum area? Round to the nearest tenth as necessary.

Answer 1

do you know how to differentiate...?

Answer 2

if you don't know calculus

a square will always have the largest area...

54/4 will give the side length

so just fins the area...