SOLUTION: My problem is: 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

Algebra ->  Finance -> SOLUTION: My problem is: 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       Log On


   



Question 1104048: My problem is:
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?
I simply cannot remember how to set this problem up. It feels like a limit equation but I know that isn't it.

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +t+ time in years to recoup the initial
$6,000 investment
+6000+%2B+120t%2F1.4+=+374.69t+
+8400+%2B+120t+=+524.566t+
+404.566t+=+8400+
+t+=+20.763+
It will take 20.763 years
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