posted by Cicley .
A ball is thrown vertically upward with an initial velocity of 64 feet per second. The distance(in feet) of the ball from the ground after t seconds is s=64t-16t.
At what time will the ball strike the ground?
For what time t is the ball more than 28 feet above the ground.
The ball will strike the ground when t is _____ seconds.
The ball is more than 28 feet above the ground for the time t when ____<t<____.