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A solution contains 0.10 μCi of 198-Au and 0.04 μCi of 131 -I at time t=0....

A solution contains 0.10 μCi of 198-Au and 0.04 μCi of 131 -I at time t=0. What is the total beta activity in the solution at t=21 days? (Answer = ? μCi)

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