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Math Help - What is this simple rational function?

  1. #1
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    What is this simple rational function?

    A home security system costs $9/month in electricity costs (you may assume this is a fixed cost over the duration of the time involved in this question). A new security system costs $1500 to purchase and lasts for 8 years.

    Determine a rational function that gives the annual cost of a security system as a function of the number of years you own the system. Using this function determine the average annual cost of the security system given above.

    ______________________________________
    C(x)=(1500+108n)/n, where n is the number of years, would be the rational function that gives the annual cost of the security system.

    What about the average annual cost of the security system given above ?
    Would it be C(8)=(1500+108(8))/8?
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  2. #2
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    Quote Originally Posted by Cuisine123 View Post
    A home security system costs $9/month in electricity costs (you may assume this is a fixed cost over the duration of the time involved in this question). A new security system costs $1500 to purchase and lasts for 8 years.

    Determine a rational function that gives the annual cost of a security system as a function of the number of years you own the system. Using this function determine the average annual cost of the security system given above.

    ______________________________________
    C(x)=(1500+108n)/n, where n is the number of years, would be the rational function that gives the annual cost of the security system.

    What about the average annual cost of the security system given above ?
    Would it be C(8)=(1500+108(8))/8?
    Yes.
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