document.write( "Question 328712: the cost for the manufacturing of a cd varies inversely with the number of cd's made. if the cost is $2.50 per cd when 10,000 are made, then what is the cost per cd when 100,000 are made? \n" ); document.write( "
Algebra.Com's Answer #235479 by Theo(13342)\"\" \"About 
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the formula for inverse variation is:\r
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\n" ); document.write( "\n" ); document.write( "y = k/x\r
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\n" ); document.write( "\n" ); document.write( "k is the constant of variation.\r
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\n" ); document.write( "\n" ); document.write( "let y = cost per cd
\n" ); document.write( "let x = number of cd\r
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\n" ); document.write( "\n" ); document.write( "y = k/x becomes:\r
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\n" ); document.write( "\n" ); document.write( "2.50 = k / 10,000\r
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\n" ); document.write( "\n" ); document.write( "Solve for k to get k = 10,000 * 2.50 = 25,000\r
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\n" ); document.write( "\n" ); document.write( "Since k is a constant, it will not change.\r
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\n" ); document.write( "\n" ); document.write( "cost when 100,000 cd are made would therefore be:\r
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\n" ); document.write( "\n" ); document.write( "y = 25,000 / 100,000 = .25 per cd.
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