A radioactive sample is detected to produce 2500 decays per minute at 6:00 p.m.and 150 decays per minute at 11:00 p.m.the same day.What is the half-life of the sample?
A) 2.81 hrs
B) 0.56 hrs
C) 1.23 hrs
D) 1.77 hrs
E) 0.89 hrs
Correct Answer:
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