Question #249290
A radioactive sample with a half-life of 3hrs contains 25-mCi radioactivity. The radioactivity of the sample after 9 days days would be?
1
Expert's answer
2021-10-10T10:26:38-0400

9 × 24 = 216hours

3hr =25mCi

216= ?

= 216× 25/3

= 1800mCi


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