Carmen is going to rent a truck for one day. There are two companies she can choose from, and they have the following prices. Company A charges an initial fee of $55 and an additional 70 cents for every mile driven. Company B has no initial fee but charges 80 cents for every mile driven. For what mileages will Company A charge at least as much as Company B? Use m for the number of miles driven, and solve your inequality for m.