A radioactive isotope has a half-life of 20 hours. How long will it take for 3/4 of the source to decay?

asked Oct 4, 2022 56.9k views

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3 votes

Answer:

40 hours

Step-by-step explanation:

in 20 hours, 1/2 will decay

in 40 hours, 1/4 will decay

therefore, 40 hours

Pierre Nortje answered Oct 10, 2022

3.8k points

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