document.write( "Question 994201: Use the position function\r
\n" ); document.write( "\n" ); document.write( "s(t) = -16t^2 + v_0t + s_0\r
\n" ); document.write( "\n" ); document.write( "v0 = initial velocity,
\n" ); document.write( " s0 = initial position,
\n" ); document.write( " t = time\r
\n" ); document.write( "\n" ); document.write( "to answer the following question.\r
\n" ); document.write( "\n" ); document.write( "You throw a ball straight up from a rooftop 170 feet high with an initial velocity of 32 feet per second. During which time period will the ball's height exceed that of the rooftop?\r
\n" ); document.write( "\n" ); document.write( "ANSWER: Between ...?? and ...?? seconds.
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Algebra.Com's Answer #613399 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
Use the position function
\n" ); document.write( "s(t) = -16t^2 + v_0t + s_0
\n" ); document.write( "v0 = initial velocity,
\n" ); document.write( "s0 = initial position,
\n" ); document.write( "t = time
\n" ); document.write( "to answer the following question.
\n" ); document.write( "You throw a ball straight up from a rooftop 170 feet high with an initial velocity of 32 feet per second. During which time period will the ball's height exceed that of the rooftop?
\n" ); document.write( "===========
\n" ); document.write( "-16t^2 + 32t + 170 > 170
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\n" ); document.write( "-16t^2 + 32t > 0
\n" ); document.write( "-----
\n" ); document.write( "-16t(t-2) > 0
\n" ); document.write( "----
\n" ); document.write( "ANSWER: Between 0 and 2 seconds.
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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