document.write( "Question 138363: During the2008 Masters Tournament, Tiger Woods ball was projected upward with an initial velocity of 88ft/sec(vo=88). When will the ball be 120 ft above the ground? \n" ); document.write( "
Algebra.Com's Answer #101059 by stanbon(75887)\"\" \"About 
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During the2008 Masters Tournament, Tiger Woods ball was projected upward with an initial velocity of 88ft/sec(vo=88). When will the ball be 120 ft above the ground?
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\n" ); document.write( "h(t) = -16t^2 + 88t
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\n" ); document.write( "Let the height be 120 and solve for \"t\":
\n" ); document.write( "-16t^2+88t = 120
\n" ); document.write( "-16t^2 + 88t - 120 = 0
\n" ); document.write( "-2t^2 + 11t - 15 = 0
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\n" ); document.write( "2t^2-11t+15 = 0\r
\n" ); document.write( "\n" ); document.write( "t = [11 +- sqrt(121 -4*2*15)]/4
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\n" ); document.write( "t = [11 +- sqrt(1)]/4
\n" ); document.write( "t = 3 or t = 5/2
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\n" ); document.write( "The ball will be at or above 120 feet between t= 2.5 seconds and 3 seconds
\n" ); document.write( "of its flight path time.
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "
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