document.write( "Question 646010: if a rock falls from a height of 37 meter on earth, the height H (in meters) after x second is approx. H(x)=37-4.9x^2\r
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\n" ); document.write( "\n" ); document.write( "2.the rock strikes the ground when x=? seconds
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Algebra.Com's Answer #405697 by solver91311(24713)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "Solve the two quadratics, discarding the negative root in each case.\r
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\n" ); document.write( "My calculator said it, I believe it, that settles it
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