When a digital clock reads 3: 47 the sum of the digits is 14. how many minutes after 3: 47 will the sum of the digits be 20 for the first time

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