document.write( "Question 1005968: In kick boxing, it is found that the force F needed to break a board varies inversely with the length L of the board. If it takes 30 pounds of force to break a board 2 feet long, how many pounds of force will it take it break a board that is 5 feet long? \n" ); document.write( "
Algebra.Com's Answer #622114 by fractalier(6550)\"\" \"About 
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An inverse relationship like this can be written as
\n" ); document.write( "FL = k
\n" ); document.write( "Here 30*2 = 60 = k
\n" ); document.write( "Then
\n" ); document.write( "F(5) = 60
\n" ); document.write( "F = 12 pounds of force
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