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April 16, 2014

Homework Help: Math - solving quadratic equations with factoring

Posted by Amy on Tuesday, January 24, 2012 at 11:13am.

A person jumps off a 20m high cliff into water below. The height of the person above the ground at time t seconds is given by the equation h=-5t^2+30. How long does it take the person to reach the half way mark to the water?

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