Math Problem Statement
A cell phone plan has a basic charge of $35 a month. The plan includes 400 free minutes and charges 10 cents for each additional minute of usage. Write the monthly cost C as a function of the number x of minutes used and graph C as a function of x for - is less than or equal to x is less than or equal to 600.
Solution
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Math Problem Analysis
Mathematical Concepts
Functions
Piecewise Functions
Formulas
-
Theorems
-
Suitable Grade Level
Grades 9-12
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