Question

3. A motorized sailboat leaves Naples, Florida, bound for Key West, 150 miles away. Maintaining a constant speed of 15 miles per hour, but encountering heavy cross-winds and strong currents, the crew finds, after 4 hours, that the sailboat is off course by 20°.
a. How far is the boat from Key West at this time?
b. Through what angle (N) should the sailboat turn to correct its course?
c. How much time has been added to the trip? (Assuming the boat maintains its speed at 15mph)