Answer:
6 seconds
Step-by-step To solve this problem, you need to solve for t when h = 0. So:
h = -16t^2 + 576
0 = -16t^2 + 576 (subtract 576 from each side)
-576 = -16t^2 (divide each side by -16)
36 = t^2 (take the square root of each side)
6 = t
So it will take the ball 6 secs to hit the ground.
