Posted by **Adrian** on Thursday, January 24, 2013 at 9:40pm.

The height of a rocket is launched from a platform 12 meters above the ground is modeled by the function h(t)=-4.9t^2+25t+12 where h(t) represents the height of the rocket in meters and t represents the number of seconds after launching. How many seconds after launching will the rocket return to the ground?

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**bobpursley**, Thursday, January 24, 2013 at 9:49pm
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