2. Cs-137 source used in mining industry has an activity of 740 MBq as of March 30, 2000. What will be its activity on Dec. 30, 2020? (T1/2 = 30 yr)

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2. Cs-137 source used in mining industry has an activity of
740 MBq as of March 30, 2000. What will be its activity on
Dec. 30, 2020? (T1/2 = 30 yr)
Transcribed Image Text:2. Cs-137 source used in mining industry has an activity of 740 MBq as of March 30, 2000. What will be its activity on Dec. 30, 2020? (T1/2 = 30 yr)
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