Toni can carry up to 18 lb in her backpack. her lunch ways 1lb her gym clothes weigh 2 lb and her backpack weigh 2 lb each. how many books can she carry on her backpack?

Marquise has 200 meters of fencing to build a rectangular garden. the garden's area (in square meters) as a function of the garden's width w w (in meters) is modeled by: a ( w ) = − w 2 + 1 0 0 w a(w)=−w 2 +100w what side width will produce the maximum garden area? meters