document.write( "Question 1118836: The strength of a rectangular beam varies jointly as its width and the square of its depth. If the strength of a beam 2 inches wide by 10 inches deep is 1000 pounds per square inch, what is the strength of a beam 4 inches wide and 8 inches deep \n" ); document.write( "
Algebra.Com's Answer #734260 by josgarithmetic(39630)\"\" \"About 
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y, strength
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\n" ); document.write( "k constant of variation\r
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\n" ); document.write( "\n" ); document.write( "\"y=k%2Aw%2Ad%5E2\"\r
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\n" ); document.write( "\n" ); document.write( "\"k=y%2F%28w%2Ad%5E2%29\"\r
\n" ); document.write( "\n" ); document.write( "\"k=1000%2F%282%2A10%5E2%29\"\r
\n" ); document.write( "\n" ); document.write( "\"k=10%2F2\"\r
\n" ); document.write( "\n" ); document.write( "\"k=5\"\r
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