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mikael mikael
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Posts: 12017
10 years ago
The decay constant of a radioactive nuclide is  5.5 × 10-3 s-1. At a given instant, the activity of a specimen of the nuclide is  70 mCi. The time interval required for the activity to decline to  40 mCi is closest to: 
A) 100 s 
B) 110 s 
C) 120 s 
D) 130 s 
E) 140 s 
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Staff Member
Educator
10 years ago
AA
Mastering in Nutritional Biology
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mikael Author
wrote...
Donated
10 years ago
Thanks again.
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