document.write( "Question 1139766: when an object is dropped from a building, the height of the object above the ground is given by the formula h=-4.9x to the 2nd power + 44.1 where h is the meters and x is the time in seconds. How long does it take for the object to reach the ground
\n" ); document.write( " \n" ); document.write( "

Algebra.Com's Answer #760253 by ikleyn(52781) $\"\"$ $\"About$

You can put this solution on YOUR website!
.
\n" ); document.write( "

\r\n" );
document.write( "\r\n" );
document.write( "h(t) = \r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "The object will hit the ground exactly and precisely at the time moment \"t\", when  h(t) = 0,  or, equivalently,\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "     = 0.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Simplify and solve for \"t\" :\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "     =  = 9\r\n" );
document.write( "\r\n" );
document.write( "    t =  = 3.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "ANSWER.  In 3 seconds.\r\n" );
document.write( "

\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Solved.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "----------------\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Do not forget to post your \"Thanks\" to me.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );