Problema Solution
phone company offers two monthly charge plans. In Plan A, there is no monthly fee, but the customer pays 8 cents per minute of use. In Plan B, the customer pays a monthly fee of $5.40 and then an additional 7 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.
Answer provided by our tutors
let 'T' represent total cost and 'm' represent minutes of use
Plan A: T = 0.08m
Plan B: T = 0.07m + 5.4
we want to solve for Plan A > Plan B
0.08m > 0.07m + 5.4
m>540
Plan A will cost more once the user exceeds 540 minutes