Your clothes washer stopped working during the spin cycle and you need to get a person in to fix the

Discussion in 'Calculator Requests' started by math_celebrity, Sep 24, 2017.

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  1. math_celebrity

    math_celebrity Administrator Staff Member

    Your clothes washer stopped working during the spin cycle and you need to get a person in to fix the washer. Company A costs $20 for the visit and $15 for every hour the person is there to fix the problem. Company B costs $40 for the visit and $5 for every hour the person is there to fix the problem. When would Company B be cheaper than Company A?

    Set up the cost functions:
    • Company A: C(h) = 15h + 20
    • Company B: C(h) = 5h + 40

    Set them equal to each other:
    15h + 20 = 5h + 40

    Using our equation solver, we get h = 2.

    With h = 3 and beyond, Company B becomes cheaper than Company A.
     

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