document.write( "Question 1116133: A ball is launched into the sky at 272 feet per second from the roof of a skyscraper 1,344 feet tall. The equation for the ball’s height h at time t seconds is h = -16t2 + 272t + 1344. When will the ball strike the ground? \n" ); document.write( "
Algebra.Com's Answer #730954 by josgarithmetic(39621)\"\" \"About 
You can put this solution on YOUR website!
h=0\r
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\n" ); document.write( "\n" ); document.write( "\"-16t%5E2%2B272t%2B1344=0\"\r
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\n" ); document.write( "\n" ); document.write( "You can simplify that equation.
\n" ); document.write( "\"t%5E2-17t-84=0\"
\n" ); document.write( "\"%28t-21%29%28t%2B4%29=0\"\r
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\n" ); document.write( "\n" ); document.write( "One solution you want and the other you do not want.
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