Saturday
April 19, 2014

Homework Help: Calculus

Posted by Anonymous on Tuesday, June 15, 2010 at 10:26pm.

A fireworks shell is shot upward with an initial velocity of 28m/s from a height of 2.5 m.

s(t) = -4.9t^2 + 28t + 2.5

After how many seconds will the shell have the same speed, but be falling downward?

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