A cell phone company charges $39.99 flat fee each month, plus $0.05 per minute. If m represents the number of minutes used in a month, which expression can be used to calculate a monthly payment?


39.99 + m

39.99 + m

0.05m + 39.99

0.05 m + 39.99

39.99m + 0.05

39.99 m + 0.05

0.05m

0.05 m