Please please help, this is urgent- what are the answers for the two?

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

How many verticies does a triangular prims have

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.