In 2 days, Quin excercises 50 minutes. At this rate, how many minutes does she excercise in 4 weeks?

In 2 days, Quin exercises 50 minutes.

In 1 day, she exercises 50/2=<<50/2=25>>25 minutes.
In 1 week, she exercises 25*7=<<25*7=175>>175 minutes.
In 4 weeks, she exercises 175*4=<<175*4=700>>700 minutes. Answer: \boxed{700}.