document.write( "Question 1171204: As Juan continued his hitting practice
\n" ); document.write( "showing off his abilities, one of the balls
\n" ); document.write( "flew over the center field stands and into
\n" ); document.write( "the parking lot. “Did you see that shot”, he
\n" ); document.write( "yelled at the girls. “The ball hung in the air
\n" ); document.write( "for at least 10 seconds”, he exclaimed.\r
\n" ); document.write( "\n" ); document.write( "The formula for this hit is:
\n" ); document.write( "h(x)=-16x^2+83x+4 where h is the
\n" ); document.write( "height of the ball and x is the number of
\n" ); document.write( "seconds the ball is in the air.\r
\n" ); document.write( "\n" ); document.write( "How long did the ball hang actually
\n" ); document.write( "hang in the air?\r
\n" ); document.write( "\n" ); document.write( "How long did the ball actually hang in the air? \n" ); document.write( "

Algebra.Com's Answer #796121 by Boreal(15235) $\"\"$ $\"About$

You can put this solution on YOUR website!
Set up as -16x^2+83x+4=0. there are two solutions, the larger of which is the time the ball hit the ground after being hit. The other is negative and may be ignored.
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\n" ); document.write( "rewrite as 16x^2-83x-4=0
\n" ); document.write( "x=(1/32)(83 +/- sqrt (83^2+256)); sqrt (7145)=84.53
\n" ); document.write( "x=(1/32)(167.53)=5.24 seconds\r
\n" ); document.write( "\n" ); document.write( " $\"graph%28300%2C300%2C-2%2C6%2C-25%2C120%2C-16x%5E2%2B83x%2B4%29\"$ \r
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