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Suppose your cell phone carrier charges you a monthly fee of $30.00 for up to 300 minutes and $0.45 for each additional minute after the first 300. Assuming you used your phone for x minutes with x > 300, the total monthly fee would be

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Answer: Need more info. We need to know how many minutes over the 300 minutes were used in order to calculate the correct monthly fee.

Explanation:

User Lena Bru
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