In two days Kenisha exercises 50 minutes at this rate how many minutes does she exercise in four weeks?
To find the number of minutes Kenisha exercises in four weeks, we need to first determine the number of minutes she exercises in two days and then multiply that by the number of two-day periods in four weeks.
Kenisha exercises 50 minutes in two days.
There are 7 days in a week, so there are 4 x 7 = <<4*7=28>>28 days in four weeks.
Thus, Kenisha exercises 50 x (28/2) = <<50*(28/2)=700>>700 minutes in four weeks. Answer: \boxed{700}.