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if a ball is thrown vertically upward with a velocity of 95 ft/s, then its height...

if a ball is thrown vertically upward with a velocity of 95 ft/s, then its height after t seconds is s=95t-19t^2  

A. what is maximum height reached by the ball?

B. what is the velocity of the ball if its 114 ft above the ground on the way up?

C. what is the velocity of the ball when it is 114 above the ground on its way down?

Math   Calculus   
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