document.write( "Question 389810: A toy rocket is launched from the top of a mountain and falls on the ground below. The height of the rocket above the ground is modeled by the relation H= -5t 2 + 20t + 105 where H is the height in meters and t is the elapsed time in seconds. How high is the mountain? \n" ); document.write( "
Algebra.Com's Answer #276336 by Alan3354(69443)\"\" \"About 
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105 meters
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