Adam celebrated his eighteenth birthday with friends at a chinese restaurant. the bill came to $287.69 without tax. the service was quite good so he decided to tip the waiter 20 percent. what is the amount of tip that adam and his friends should leave for the waiter?

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