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December 19, 2014

Homework Help: physics

Posted by lee on Sunday, May 22, 2011 at 8:59pm.

If a ball is thrown upwards at 20 ft/sec, the height h after t seconds is given by h = -16t^2 + 20t. 

How many seconds does it take for the ball to reach its maximum height, and what is this height?

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