document.write( "Question 1104048: My problem is:\r
\n" ); document.write( "\n" ); document.write( "LED replacement lightbulbs in a park will save the park district $374.69 per year in electricity costs. Additionally, LED bulbs last much longer than traditional bulbs, which need to be replaced every 1.4 years at a total cost of $120. How long will it take for the cost savings to recoup an initial $6,000 investment if the LED bulbs don't have to be replaced during that time?\r
\n" ); document.write( "\n" ); document.write( "I simply cannot remember how to set this problem up. It feels like a limit equation but I know that isn't it.
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Algebra.Com's Answer #718848 by josmiceli(19441)\"\" \"About 
You can put this solution on YOUR website!
Let \"+t+\" time in years to recoup the initial
\n" ); document.write( "$6,000 investment
\n" ); document.write( "\"+6000+%2B+120t%2F1.4+=+374.69t+\"
\n" ); document.write( "\"+8400+%2B+120t+=+524.566t+\"
\n" ); document.write( "\"+404.566t+=+8400+\"
\n" ); document.write( "\"+t+=+20.763+\"
\n" ); document.write( "It will take 20.763 years
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\n" ); document.write( "If this doesn't make sense, or just isn't right,
\n" ); document.write( "get a 2nd opinion\r
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