document.write( "Question 52408: Business and finance. The revenue for a sandwich shop is directly proportional
\n" ); document.write( "to its advertising budget. When the owner spent $2000 a month on advertising, the
\n" ); document.write( "revenue was $120,000. If the revenue is now $180,000, how much is the owner
\n" ); document.write( "spending on advertising?
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Algebra.Com's Answer #34945 by ChillyWiz(11)\"\" \"About 
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Directly Proportional means that
\n" ); document.write( "WHEN revenue for sandwich shop rises,advertising buget ALSO rises\r
\n" ); document.write( "\n" ); document.write( "Let S = sandwich shop revenue
\n" ); document.write( "Let B = advertising budget\r
\n" ); document.write( "\n" ); document.write( "Relationship of S and B are directly proportional.. think \"%28x%2Fy%29=k\"
\n" ); document.write( "so \"%28B%2FS%29=k\", where k is a constant number that NEVER changes\r
\n" ); document.write( "\n" ); document.write( "For the first time, $2,000 on advertising budget nets us $120,000
\n" ); document.write( "\"%282000%2F120000%29=k\" -> \"k=%281%2F6%29\"\r
\n" ); document.write( "\n" ); document.write( "Then if the revenue is now $180,000
\n" ); document.write( "Solving for B gives us \"B=S%2Ak\" -> \"B=180000%2A%281%2F6%29\"
\n" ); document.write( "\"B=3000\"\r
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