document.write( "Question 633505: A baseball hit from home plate is described by the equation h = -16t2 + 100t + 5, where the height is h and the time is t.\r
\n" ); document.write( "\n" ); document.write( "The bleachers are 20 feet from the ground. When will the baseball land in the bleachers? Round your answer to the nearest tenth of a second.
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Algebra.Com's Answer #398952 by ankor@dixie-net.com(22740)\"\" \"About 
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A baseball hit from home plate is described by the equation
\n" ); document.write( " h = -16t^2 + 100t + 5, where the height is h and the time is t.
\n" ); document.write( "The bleachers are 20 feet from the ground.
\n" ); document.write( " When will the baseball land in the bleachers?
\n" ); document.write( " Round your answer to the nearest tenth of a second.
\n" ); document.write( ":
\n" ); document.write( "The equation for this scenario; h = 20, therefore
\n" ); document.write( "-16t^2 + 100t + 5 = 20
\n" ); document.write( "-16t^2 + 100t + 5 - 20 = 0
\n" ); document.write( "-16t^2 + 100t - 15 = 0
\n" ); document.write( "Use the quadratic formula
\n" ); document.write( "\"x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"
\n" ); document.write( "In this equation x=t; a=-16; b=100; c=-15
\n" ); document.write( "\"t+=+%28-100+%2B-+sqrt%28100%5E2-4%2A-16%2A-15+%29%29%2F%282%2A-16%29+\"
\n" ); document.write( ":
\n" ); document.write( "\"t+=+%28-100+%2B-+sqrt%2810000-960+%29%29%2F%28-32%29+\"
\n" ); document.write( "You should be able to do the math now, only one solution will make sense
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