Posted by **matttt** on Sunday, October 28, 2007 at 9:22pm.

if a ball is thrown vertically upward with a velocity of 80m/s then its height after t seconds is s=80t-16t^2

a) what is the maximum height reached by the ball?

b)what is the velocity of the ball when it is 96 ft above the ground on its way up? on its way down?

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