A phone company offers two monthly charge plans. In Plan A, there is no monthly fee, but the customer pays 7 cents per minute of use. In Plan B, the customer pays a monthly fee of $7.20 and then an additional 4 cents per minute of use.
For what amounts of monthly phone use will Plan A cost more than Plan B?
Use m for the number of minutes of phone use in a month, and solve your inequality for m.