Michael is going to rent a truck for one day. There are two companies he can choose from, and they have the following prices:

Company A charges an initial fee of $20 and an additional 60 cents for every mile driven.

Company B charges an initial fee of $35 and an additional 40 cents for every mile driven.

For what mileages will Co A charge less than Co B?

Write your answer as an inequality, using m for the number of miles driven