Multiple Choice
A freshly prepared sample of curium-243 undergoes 3312 disintegrations per second. After 2.00 y., the activity of the sample declines to 3115 disintegrations per second. The 
of 
is 
A) 0.157
B) 2.13
C) 32.6
D) 1.88
E) 22.6
Correct Answer:
Verified
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