C Solar =30,000+150x

The previous formulas model the total cost, in dollars for electric and solar heating systems, x years since installation. What is the ratio of the total cost for electric heating to the total cost for solar heating 5 years after installation? What is the ratio 40 years after installation? In a long term; how will be the solar heating system in relation to the electric heating system? Comment and support your comments. Compare the results to 5 years and to 40 years, what would be your conclusions?

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