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A ball is thrown vertically upwark with an initial velocity of 48ft/sec and a height of 8ft, then its height s(t) from the ground level at time t is given by

s(t)=-16t^2+48t+8

1) determine the time it takes the ball to reach its maximum height
2) Determine the maximum height the ball reaches
3) Determine the time it takes the ball to hit the ground

 

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