document.write( "Question 622025: I know this is a quadratic equation(word problem)I just can't make it work. This is the last algebra problem I hope to have.\r
\n" ); document.write( "\n" ); document.write( "If a stone is tossed from the top of a 250 meter building, the height of the stone as a function of time is given by h(t)= -9.8t^2 - 10t + 250, where t is in seconds, and height is in meters. After how seconds will the stone hit the ground? Round to the nearest hundreths place.\r
\n" ); document.write( "\n" ); document.write( "Thanks so much\r
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Algebra.Com's Answer #391075 by ewatrrr(24785)\"\" \"About 
You can put this solution on YOUR website!
 
\n" ); document.write( "Hi,
\n" ); document.write( "by h(t)= -9.8t^2 - 10t + 250, where t is in seconds, and height is in meters.
\n" ); document.write( "Hits the ground, then h =0
\n" ); document.write( " -9.8t^2 - 10t + 250 = 0
\n" ); document.write( "\"t+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"
\n" ); document.write( "\"t+=+%2810+%2B-+sqrt%28+9900%29%29%2F%28-19.6%29+\"
\n" ); document.write( "throwing out negative solution for time
\n" ); document.write( " t = 4.566sec
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