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How many half lives has an isotope gone theough if it has 12.5% of the radioactive substance remaining

How many half lives has an isotope gone theough if it has 12.5% of the radioactive substance remaining
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How many half lives has an isotope gone theough if it has 12.5% of the radioactive substance remaining

User Lloyd Moore
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Answer:

15.81 years

Step-by-step explanation:

User TheRookierLearner
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