document.write( "Question 1038550: A gentleman jumps out of an airplane without a parachute at 21,980 feet and lives to tell the tale. The function h(t)=-16tē+21,980 describes the relationship between height in feet and the time in seconds. How many seconds did he fall before reaching the ground? \n" ); document.write( "
Algebra.Com's Answer #653249 by ankor@dixie-net.com(22740)\"\" \"About 
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The function h(t)=-16tē+21,980 describes the relationship between height in feet and the time in seconds. How many seconds did he fall before reaching the ground?
\n" ); document.write( ":
\n" ); document.write( "Ground level, h=0, therefore
\n" ); document.write( "-16t^2 + 21980 = 0
\n" ); document.write( "-16t^2 = -21980
\n" ); document.write( "same as
\n" ); document.write( "16t^2 = 21980
\n" ); document.write( "t^2 = 21980/16
\n" ); document.write( "t^2 = 1373.75
\n" ); document.write( "t = \"sqrt%281373.75%29\"
\n" ); document.write( "t = 37 secs falling to the ground \n" ); document.write( "
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