Asked by Jennifer

A radioactive isotope has a half life of 8.1 days. If the sample starts with 25 grams, how much will there be after 90 days?

Answers

Answered by Steve
90 days is 90/8.1 = 11.111 half-lives, so there would be

25*(1/2)^11.111 left
Answered by Jennifer
THANK YOU!!
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