Dimensions of a building A small office unit is to contain 500 ft2 of floor space. A simpl...

Dimensions of a building A small office unit is to contain 500 ft2 of floor space. A simplified model is shown in the figure on the next page.

(a) Express the length y of the building as a function of the width x.

(b) If the walls cost $100 per running foot, express the cost C of the walls as a function of the width x. (Disregard the wall space above the doors and the thickness of the walls.)

EXERCISE