document.write( "Question 933493: A rock is thrown from the top of a tall building. The formula h = -16t + 234 describes the height of the rock, h in feet, t seconds after the rock is thrown. How long after the rock is thrown does it hit the ground? \n" ); document.write( "
Algebra.Com's Answer #566848 by MathLover1(20850)\"\" \"About 
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The formula \"h+=+-16t+%2B+234\" describes the \"height\" of the rock, \"h\"} in feet, \"t\" seconds after the rock is thrown. \r
\n" ); document.write( "\n" ); document.write( "How long after the rock is thrown does it hit the ground?\r
\n" ); document.write( "\n" ); document.write( "Set \"h\" to \"zero\" (since when height = 0, it'll hit the ground)and
\n" ); document.write( "solve for \"t\" \r
\n" ); document.write( "\n" ); document.write( " \"0=+-16t+%2B+234\"\r
\n" ); document.write( "\n" ); document.write( "\"16t+=234\"\r
\n" ); document.write( "\n" ); document.write( "\"t=234%2F16\"\r
\n" ); document.write( "\n" ); document.write( "\"t=14.625\"\r
\n" ); document.write( "\n" ); document.write( "so, the rock will hit the ground in \"14.625\" seconds
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