Deon is going to rent a truck for one day. There are two companoes he can choose from, and they have the following prices. company a charges an a initial fee of $40 and an additional 60 cents for every mile driven. company b charges an initial fee of $49.50 and an additional 50 cents for every mile driven. For what mileages will company a charge no more than company b? write your answer as an inequality, using m for the number of miles driven.