document.write( "Question 1175489: An object is thrown downward with an initial velocity of 8 feet per second. The relationship between the distance s it travels and time t is given by s=8t+16t^2. How long does it take the object to fall 80 feet? \n" ); document.write( "

Algebra.Com's Answer #801141 by ikleyn(52782) $\"\"$ $\"About$

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document.write( "To answer this question, solve an equation\r\n" );
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document.write( "    16t^2 + 8t = 80  feet.\r\n" );
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document.write( "Cancel factor 8 in both sides\r\n" );
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document.write( "    2t^2 + t - 10 = 0\r\n" );
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document.write( "     =  =  =  = .\r\n" );
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document.write( "Take the positive root  t =  = 2 seconds.      ANSWER\r\n" );
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