Two radioactive nuclei A and B are present in equal numbers to begin with. Three days...

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Two radioactive nuclei A and B are present in equal numbers to begin with. Three days...

Two radioactive nuclei A and B are present in equal numbers to begin with. Three days later, there are 4.28 times as many A nuclei as there are B nuclei. The half-life of species B is 2.08 days. Find the half-life of species A (in days).

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