HELP!!

A small office unit is to contain 600 ft2

of floor space. A simplified model is shown in the

figure.

AUse an equation to express the length y of the building in terms of the width x.

BIf the walls cost $100 per running foot, use an equation to express the cost C of the

walls in terms of the width x. (Disregard the wall space above the doors and the thickness

of the walls.)

wall space above the door=3'