document.write( "Question 607842: A rock falls from a tower that is 480 feet high. As it is falling, its height is given by the formula h(t)=480-16t^2. How many seconds will it take for the rock to hit the ground (h=0)? Round to the nearest tenth. \n" ); document.write( "

Algebra.Com's Answer #382921 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

 
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document.write( "Hi
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document.write( "h(t)=480-16t^2
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document.write( "How many seconds will it take for the rock to hit the ground (h=0
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document.write( " 480-16t^2 = 0
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document.write( "    30 = t^2
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document.write( "    5.5sec = t \n" );
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