PLEASE HELP ME!! Use the given values of n and p to find the minimum usual value μ - 2σ and the maximum usual value μ + 2σ.

n = 290, p = 1/4

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