Pre-Calculus

posted by Ann

A local photocopying store advertises as follows. " We charge 14 cents per copy for 150 copies or less,6 cents per copy for each copy over 150 but less than 230, and 3 cents per copy for each copy 230 and above. " Let x be the number of copies ordered and C(x) be the cost of the job (in cents ).


If x ≤ 150, what is the the cost C(x) of the copies?

I don't know how to to do this because I can't figure out what the fixed overhead cost would be...please help

  1. Steve

    there is no fixed cost
    C(x) = 14x for x<=150

  2. Ann

    Then what would the cost be for 150<x<230? I don't think there's a fixed cost for this either, but I don't think it'd be correct to write C(x) = 6x.

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