document.write( "Question 1158980: The height h in feet of an object after t seconds is given by the function
\n" ); document.write( " h = - 16t2 + 80t + 6.
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Algebra.Com's Answer #781972 by ikleyn(52781) $\"\"$ $\"About$

You can put this solution on YOUR website!
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document.write( "For it, you need to solve this quadratic equation\r\n" );
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document.write( "    -16*t^2 + 80t + 6 = 0.\r\n" );
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document.write( "Or\r\n" );
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document.write( "    16*t^2 - 80t - 6 = 0\r\n" );
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document.write( "     =  = .\r\n" );
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document.write( "You do not need negative root - it makes no sense.\r\n" );
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document.write( "You need only positive root  t =   = 5.074.   (rounded)\r\n" );
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document.write( "ANSWER.  5.074 seconds.\r\n" );
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