Question

What is the maximum possible area, in square inches, of a rectangle with a perimeter of 20 inches?

Answer 1

K.... give me a sec...

Answer 2

is this a calculus question @Albert0898

Answer 3

you are given 2x+2y=20
or dividing both sides by 2
you are given x+y=10
or if you solve for y
you are given y=10-x

You want to maximize A=xy
replace y with (10-x)

Find A' and then the critical numbers

Answer 4

nice. Got it before me. Guess I was to slow.