document.write( "Question 245696: A rock falls from a tower that is 73.5 m high. As it is falling, its height is given by the formula h=73.5 -4.9t^2, with t in seconds. How many seconds will it take for the rock to hit the ground? (h=0)? \n" ); document.write( "
Algebra.Com's Answer #179412 by Alan3354(69443)\"\" \"About 
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h=73.5 -4.9t^2 = 0
\n" ); document.write( "t^2 = 73.5/4.9
\n" ); document.write( "t^2 = 15
\n" ); document.write( "t =~ 3.873 seconds
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