A ball travels on a parabolic path in which the height (in feet) is given by the expression $-25t^2+75t+24$, where $t$ is the time after launch. At what time is the height of the ball at its maximum?
+36916 maximum will occur at t = - b/2a a = -25 b = 75 c = 24 I think you can now figure it out !
