The height in feet of a golf ball hit into the air is given by #h= -16t^2 + 64t#, where t is the number of seconds elapsed since the ball was hit. How long does it take for the ball to reach the maximum height?
The trajectory of the ball is a downward parabola passing by the origin. The ball reaches the maximum height at the parabola's vertex. On the coordinate grid (t, h),
t-coordinate of vertex:
Answer: It takes 2 second for the ball to reach the max height h.