Saturday
April 19, 2014

Homework Help: Math

Posted by Tom on Monday, March 3, 2008 at 9:55pm.

A rocket is launched upward and then falls to the ground. The height of the rocket above the ground is h= -16t^2 - 400t where h is the height of the rocket in feet and t is the number of seconds of the flight. How many seconds will it take for the rocket to fall back to the ground?

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