A ball is projected upward from the top of a 144 feet building at a velocity of 64 feet per second.

A ball is projected upward from the top of a 144 feet building at a velocity of 64 feet per second. It's path is described by the function h(t)= -16^2+64t+144, where t is the time after the ball is projected and h(t) is the height of the ball at any time t seconds.

Find both x-intercepts and interpret what they mean in the context of the problem.