Aphone 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 $6.80 and then an additional 6 cents per minute of use.
for what amounts of monthly phone use will plan a cost more than plan b?
usem for the number of minutes of phone use in a month, and solve your inequality for m.