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The activity of a radioactive isotope fa...

The activity of a radioactive isotope falls to `12.5%` in 90 days. Compute the half life and decay constatn of isotope.

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The correct Answer is:
`30 "day", 2.31xx10^(-2) "day"^(-1)`
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P BAHADUR-RADIO ACTIVITY-Exercies 9
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