(15)/(16)  th of a radioactive substance disintegrates in 12 days. What is the half-life period of the radioactive s

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Q 3140167913.     (15)/(16)  th of a radioactive substance disintegrates in 12 days. What is the half-life period of the radioactive substance ? How much more time will it take for the remaining amount of radioactive substance to reduce 1/(32) of the reduced amount?

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