Oceanside bike rental shop charges 14 dollars plus 9 dollars an hour for renting a bike. joan paid 86 dollars to rent a bike . how many hours did she pay to have the biked checked out?

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