Asked by Christine

If Radium-223 has a half life of 10.33 days, what time duration would it require for the activity associated with this sample to decrease 1.5% of its present value?

Answers

Answered by oobleck
(1/2)^(x/10.33) = 0.985
x = 0.225 days

Now, if you meant to say "decrease to 1.5%" then that would be
(1/2)^(x/10.33) = 0.015
x = 68.63 days
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