document.write( "Question 592319: The equation is h(t)=-16t2+1000. An object is being dropped from a height of 1000 feet. How long would it take to drop to 500 feet? \n" ); document.write( "
Algebra.Com's Answer #375969 by ankor@dixie-net.com(22740)\"\" \"About 
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The equation is h(t)=-16t2+1000.
\n" ); document.write( " An object is being dropped from a height of 1000 feet.
\n" ); document.write( "How long would it take to drop to 500 feet?
\n" ); document.write( ":
\n" ); document.write( "When it has dropped 500', it will be 500' above the ground , therefore h(t) = 500
\n" ); document.write( "-16t^2 + 1000 = 500
\n" ); document.write( "-16t^2 = 500 - 1000
\n" ); document.write( "-16t^2 = -500
\n" ); document.write( "Multiply both sides by -1
\n" ); document.write( "16t^2 = 500
\n" ); document.write( "divide both sides by 16
\n" ); document.write( "t^2 = \"500%2F16\"
\n" ); document.write( "t^2 = 31.25
\n" ); document.write( "t = \"sqrt%2831.25%29\"
\n" ); document.write( "t = 5.59 seconds to drop 500 ft \n" ); document.write( "
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