document.write( "Question 34810: A rock falls from a tower that is 53.9 m high. As it is falling, its height is given by the formula h = 53.9 - 4.9t^2. How many seconds will it take for the rock to hit he ground (h=0)? Round to the nearest tenth, if necessary.\r
\n" );
document.write( "\n" );
document.write( " \r
\n" );
document.write( "\n" );
document.write( "A) 7 sec
\n" );
document.write( " \r
\n" );
document.write( "\n" );
document.write( "B) 592.9 sec
\n" );
document.write( " \r
\n" );
document.write( "\n" );
document.write( "C) 7.3 sec
\n" );
document.write( " \r
\n" );
document.write( "\n" );
document.write( "D) 3.3 sec \n" );
document.write( "
Algebra.Com's Answer #21051 by checkley71(8403)![]() ![]() ![]() You can put this solution on YOUR website! 0=53.9-4.9t~2 or 0=11-t2 or t~2=11 or t=3.3 sec\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |