document.write( "Question 49206: Please help me with this...I can not figure this out. \r
\n" ); document.write( "\n" ); document.write( "Science and medicine: The equation h= -16t^2 +112t gives the height of an arrow, shot upward from the ground with and initial velocity of 112 ft/s, where t is the time after the arrow leaves the ground. Find the time it takes for the arrow to reach height of 180 ft.
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Algebra.Com's Answer #32652 by tutorcecilia(2152)\"\" \"About 
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h= -16t^2 +112t
\n" ); document.write( " 180=-16t^2 +112t
\n" ); document.write( " 180-180 = -16t^2 +112t -180
\n" ); document.write( " -16t^2 +112t -180 = 0
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\n" ); document.write( "t = 2.5 or t = 4.5
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