Question

For her phone service, Kala pays a monthly fee of $10 , and she pays an additional $0.04 per minute of use. The least she has been charged in a month is $69.48. What are the possible numbers of minutes she has used her phone in a month? Use m for the number of minutes, and solve your inequality for m .

Answer 1

1487

Explanation:

The inequality is 0.04m + 10 ≥ 69.48. We use ≥ and not > because it says "least", indicating that we need to use the ≥ sign. Solving for m we get:

0.04m + 10 ≥ 69.48

0.04m ≥ 59.48

m ≥ 1487

The smallest integer that satisfies this inequality is 1487 minutes.