Z varies jointly as Y and W and Inversely as the square of X if Z=189 Y=28 W=16 X=8 what is the value of the variation constant. what is the variation equation.
what is the value of z where y=24, w=4 x=8.​

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