Question

Please help 12 points!!!!!

Answer 1

Answer:

100,100

Step-by-step explanation:

perimeter=400 m

length=x

let width=y

2(x+y)=400

x+y=200

y=200-x

area A=xy=x(200-x)=200x-x²

$\frac{dA}{dx} =200-2x\\when \frac{dA}{dx} =0\\200-2x=0\\x=100\\\frac{d^2A}{dx^2} =-2$