A ball is thrown upward at an initial velocity of 8.4m/s. The height of the ball h, in meters, above the ground after t, in seconds, is modelled by h= -4.9t^2 + 19.6t + 0.4.

Question

At what time(s) does the firework reach its maximum?

Answer 1

Maximum height occurs at t = -19.6 / (2)(-4.9)