In two days, Quanisha exercises for a total of 15 minutes.
In one day, Quanisha exercises for 15/2 = <<15/2=7.5>>7.5 minutes.
In a week, Quanisha exercises for 7.5 * 7 = <<7.5*7=52.5>>52.5 minutes.
In four weeks, Quanisha exercises for 52.5 * 4 = <<52.5*4=210>>210 minutes. Answer: \boxed{210}.
In two days Quanisha exercise is 15 minutes at this rate how many minutes does she exercise in four weeks?
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