Plz ! i need this answer fast!
a cell phone service provider offers two plans. plan a includes a fee of $25 per month and charges $0.25 for every call. plan b includes a fee of $40 per month and offers unlimited calls. for what number of phone calls is the cost of plan b less than the cost of plan a?
more than 60 calls
more than 160 calls
more than 120 calls
more than 100 calls