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Two separate radioisotopes, A and B, with two different half lives (T1/2,A=3.02 days and T1/2,B=8.28 days) are used in a laboratory procedure. At the time the supplies are monitored, the activity of radioisotope A is observed to be 3 times greater than the activity of the second radioisotope. Find how many days later will the two activates be equal?

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