Mr. Chris’s new app “Tick-Tock” is the hottest thing to hit the app store since...ever. It costs $5

Discussion in 'Calculator Requests' started by math_celebrity, Sep 7, 2021.

  1. math_celebrity

    math_celebrity Administrator Staff Member

    Mr. Chris’s new app “Tick-Tock” is the hottest thing to hit the app store since...ever. It costs $5 to buy the app and then $2.99 for each month that you subscribe (a bargain!). How much would it cost to use the app for one year? Write an equation to model this using the variable “m” to represent the number of months that you use the app.

    Set up the cost function C(m) where m is the number of months you subscribe:
    C(m) = Monthly Subscription Fee * months + Purchase fee
    C(m) = 2.99m + 5
     

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