Rosa has already jarred 12 liters of jam and will jar an additional 1 liter of jam every day. How many days does Rosa need to spend making jam if she wants to jar 20 liters of jam in all?

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