Multiple Choice
A radioactive material has a half-life of 2.5 hours. The activity of a sample was measured to be 375 cps. What was the activity of the sample 6 hr, 15 min earlier?
A) 60 cps
B) 66 cps
C) 8.6 × 102 cps
D) 2.1 × 103 cps
E) 4.9 × 103 cps
Correct Answer:
Verified
Correct Answer:
Verified
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