document.write( "Question 994201: Use the position function\r
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document.write( "s(t) = -16t^2 + v_0t + s_0\r
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document.write( "v0 = initial velocity,
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document.write( " s0 = initial position,
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document.write( " t = time\r
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document.write( "to answer the following question.\r
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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
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document.write( "ANSWER: Between ...?? and ...?? seconds. \n" );
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Algebra.Com's Answer #613399 by stanbon(75887)![]() ![]() ![]() 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 \n" ); document.write( "----- \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. \n" ); document.write( "---- \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "------- \n" ); document.write( " |