<PRE><B>Question 1052153</B>
The Purple Mobile Phone Company offers the following two pricing plans to customers. 
Plan A costs $15/month, with calls at 25c/minute,
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Cost = $15 + $0.25t
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while Plan B costs $100/month with calls at 14c/minute.
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Same as above.
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 Find an equation that gives C, the cost in dollars, in terms of t, the call time in minutes per month for each plan.
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