Does anyone know how to do this i am not sure how to solve this !

A50% increase followed by 33 1/2% decrease

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

Which of the following scenarios demonstrates an exponential decay