document.write( "Question 604828: If a rocket is propelled upward from ground level at 98 m/sec, its height in meters after t seconds is given by h=-4.9t+98t. During what interval of time will the rocket be higher than 445.9m? \n" ); document.write( "
Algebra.Com's Answer #381432 by stanbon(75887)\"\" \"About 
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If a rocket is propelled upward from ground level at 98 m/sec, its height in meters after t seconds is given by h=-4.9t^2+98t. During what interval of time will the rocket be higher than 445.9m?
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\n" ); document.write( "Solve:
\n" ); document.write( "-4.9t^2+98t-445.9 = 0
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\n" ); document.write( "Ans: 7< t < 13
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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