the life cycle of a colbt is 5.27 years. if 100 grams of radioactive colbalf is present now how much will be present in 20 years

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2016-04-26 10:14:35

just divide 20 by 2 then you will get 10 and then divide 20 by 10 and you get 0.5 and then divide that by 5.27 and you will get 0.09487666 which is about =0.09

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