A ball is tossed vertically upward from a building which is 64 feet above the ground. The ball's height above the ground as it travels is modeled by the equation: h=-16t²+48t+64 where t is the time (in seconds) the ball has been in flight and h is the height of the ball (in feet) at any particular time. How long does it take for the ball to hit the ground?
o 1 second
o 3 seconds
o 4 seconds
o -1 seconds and 4 seconds
