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April 23, 2014

Homework Help: calculus

Posted by help on Saturday, July 7, 2012 at 8:34pm.

Can some explain how to do this problem? I tried using derivatives...but...I keep getting a different answer from what my teacher told me!

A projectile is fired directly upward with an initial velocity of 144 ft/sec and its height (in feet) above the ground after t seconds is given by s(t). Find the (a) the velocity and acceleration after t seconds (b) the maximum height and (c) the duration of the flight.

s(t)= 144-16t^2

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