document.write( "Question 1131807: The height of a ball after it has been hit from the top of a hill can be modeled by the equation h= -8(2t-4)(t+1), where H is height in feet and t is time in seconds. How long is the ball in the air? \n" ); document.write( "
Algebra.Com's Answer #748481 by Boreal(15235)\"\" \"About 
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set h=0
\n" ); document.write( "and the results are t=2 or t=-1, which can be excluded.
\n" ); document.write( "The ball is in the air for 2 seconds
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