A cell phone plan charges $1.25 for the first 400 minutes and $0.25 for each additional minute, x. W

Discussion in 'Calculator Requests' started by math_celebrity, Mar 26, 2017.

  1. math_celebrity

    math_celebrity Administrator Staff Member

    A cell phone plan charges $1.25 for the first 400 minutes and $0.25 for each additional minute, x. Which represents the cost of the cell phone plan?

    Let C(x) be the cost function where x is the number of minutes we have:
    C(x) = 1.25(min(400, x)) + 0.25(Max(0, 400 - x))
     

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