document.write( "Question 1180183: Henry throws a tennis ball over his house. The ball is 6 feet above the ground when he lets it go. The quadratic function that models the height, in feet, of the ball after t seconds is mc003-1.jpg. How long does it take for the ball to hit the ground? \n" ); document.write( "
Algebra.Com's Answer #809798 by mananth(16946)\"\" \"About 
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model equation? \n" ); document.write( "
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