Angles, Bearings and Angular Velocity

City X is 85 miles due south of City Y, and City Z is 15 miles due west of City X. What is the bearing of City Z from City Y?

Bearing means angle right? How do I find th angle that corresponds there?

A boat sails for 3 hours at 15 mph in a direction 105°17'. How far south has it sailed?

The way I see it, a boat has been sailing somewhat NNW for 45 miles... how do I determine how far south it's gone?

Two pulleys of diameter 6 m and 3 m are connected by a belt. The larger pulley rotates 41 times per min. Find the angular speed of the smaller pulley.

V = rw and w = theta/t

how do I find theta to plug in my formula?