document.write( "Question 708461: A student dropped a ball from the top of a 81-foot building. The height of the ball after t seconds is given by the quadratic equation h= -9t(squared) + 81. How long does it take the ball to hit the ground? \n" ); document.write( "

Algebra.Com's Answer #436109 by solver91311(24713) $\"\"$ $\"About$

You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "What planet are you on? The acceleration due to gravity on earth is -32 ft per second per second, so if you are on earth and using feet as your unit of distance measure then the height function is

. Wherever you are performing this experiment, it isn't even in our solar system.\r
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\n" ); document.write( "\n" ); document.write( "Be that as it may, the hint for solving your problem as stated is: The height of the ground is zero.\r
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\n" ); document.write( "\n" ); document.write( "John
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\n" ); document.write( "Egw to Beta kai to Sigma
\n" ); document.write( "My calculator said it, I believe it, that settles it
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