Asked by Anonymous
A radioactive material takes 60 days to cut its radiation in half. If it starts at 100%, when will it be at 5%?
Answers
Answered by
Steve
when (1/2)^(t/60) = .05
t/60 = log.05/log.5
t = 259.3 days
t/60 = log.05/log.5
t = 259.3 days
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