5. (3 pts) Standing on the top of a house 48 feet above the ground, John shoots a trick basketball shot upward according to the equation h = -16t2 + 32t + 48, where h is the height of the ball
in feet, and t is the time in seconds. How long will it take for John's airball to hit the ground?
(Hint: h is the height of the ball when it hits the ground.)