Can someone please help?

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

Use the quadratic function to predict f(x) if x equals 8. f(x) = 25x2 − 28x + 585

Write the equations in logarithmic form 9^4=6,561