document.write( "Question 174737: The height, h (in feet), of a falling object on Mars is given h=-6t^2+s, where t is the time in seconds and s is the initial height in feet. If an object were dropped from a height of 145 feet, how long would it take to reach the ground? \n" ); document.write( "

Algebra.Com's Answer #129805 by josmiceli(19441) $\"\"$ $\"About$

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$\"h+=+-6t%5E2+%2B+s\"$
\n" ); document.write( "What the problem is saying is that the initial height
\n" ); document.write( "is 145' and they want to know how long it will take to
\n" ); document.write( "drop to 0' (all the way to the ground), so
\n" ); document.write( " $\"h+=+0\"$
\n" ); document.write( " $\"s+=+145\"$
\n" ); document.write( " $\"0+=+-6t%5E2+%2B+145\"$
\n" ); document.write( " $\"6t%5E2+=+145\"$
\n" ); document.write( " $\"t%5E2+=+145%2F6\"$
\n" ); document.write( " $\"t+=+sqrt%2824.167%29\"$
\n" ); document.write( " $\"t+=+4.92\"$ sec \n" ); document.write( "

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