Rob L. answered 05/26/16
Tutor
New to Wyzant
Patient and Knowledgeable NC Certified Math Teacher/Tutor
This sounds like there is a little trick here. The question is only asking about Mary. This means that you can ignore the first sentence. Since a circle has 360 degrees. One turn would be 360 degrees and two turns would be 360*2 or 720 degrees.
I believe that this is one of those times that they put in a lot of additional information that you will never use.
I hope this helps. Let me know if you have any questions.