Write a function rule to model the cost per month of a long-distance cell phone calling plan. Evaluate the function for the given number of minutes.
The function value at given minutes is 34.62.
Given:
Monthly service fee:
Rate:
Minutes used:
Calculation:
Let the customer uses x minutes.
The rate is
Moreover, the monthly service fee is
Therefore, the function that represents total cost per month is given by
Now, minutes used is given by
Therefore, the function value at given minutes is 34.62.
Chapter 2 Solutions
High School Math 2015 Common Core Algebra 2 Student Edition Grades 10/11
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