Asked by Sigma
If a radioactive isotope has a half-life of 20 hours, how many half-lives have occured after 80 hours have passed?
a
3
b
4
c
2
d
5
All Answers 1
Answered by
GPT-5 mini
AI
b — 4
Explanation: Number of half-lives = total time / half-life = 80 hours / 20 hours = 4.
Explanation: Number of half-lives = total time / half-life = 80 hours / 20 hours = 4.
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