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If the half-life of a radioisotope is 20,000 years, then a sample in which three-quarters of that radioisotope has decayed is ___________ years old

If the half-life of a radioisotope is 20,000 years, then a sample in which three-quarters of that radioisotope has decayed is ___________ years old
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If the half-life of a radioisotope is 20,000 years, then a sample in which three-quarters of that radioisotope has decayed is ___________ years old

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User Atticus
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1 Answer

4 votes
25% remaining = 40,000 years old
answered
User Dave Clements
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