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  1. MHB Apprentice

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    #1
    Dear friends,

    I am unable to solve the following problem. Will appreciate your help here. Thanks in advance.

    The Purple Mobile Phone Company offers the following two pricing plans to customers. Plan A costs \$15/month, with calls at 25c/minute, while Plan B costs \$100/month with calls at 14c/minute. Find an equation that gives C, the cost in dollars, in terms of t, the call time in minutes per month for each plan.

  2. MHB Journeyman
    MHB Math Helper

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    #2
    Quote Originally Posted by tantrik View Post
    Dear friends,

    I am unable to solve the following problem. Will appreciate your help here. Thanks in advance.

    The Purple Mobile Phone Company offers the following two pricing plans to customers. Plan A costs \$15/month, with calls at 25c/minute, while Plan B costs \$100/month with calls at 14c/minute. Find an equation that gives C, the cost in dollars, in terms of t, the call time in minutes per month for each plan.
    You are given t in minutes and want to get C in dollars. There is a "cents/minute" so multiplying by t in minutes will result in cents. Dividing that by 100 cents/dollar will put it into dollars. The monthly cost is already in dollars so you can just add that:
    C= 15+ (25/100)t

    C= 100+ (14/100)t.

  3. MHB Apprentice

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    Quote Originally Posted by HallsofIvy View Post
    You are given t in minutes and want to get C in dollars. There is a "cents/minute" so multiplying by t in minutes will result in cents. Dividing that by 100 cents/dollar will put it into dollars. The monthly cost is already in dollars so you can just add that:
    C= 15+ (25/100)t

    C= 100+ (14/100)t.
    Thanks for your explanation and working for the problem.

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