A phone company offers two monthly charge plans. In Plan A, the customer pays a monthly fee of $7.80 and then an additional 7 cents per minute of use. In Plan B, there is no monthly fee, but the customer pays 9 cents per minute of use. For what amounts of monthly phone use will Plan A cost at least as much as Plan B? Use m for the number of minutes of phone use in a month, and solve your inequality for m. <0 > X 9 ?