A radioactive substance in the laboratory has a half-life of 8 h.At noon today,a Geiger counter reads 480 counts/min above background.At noon tomorrow,the counter should read about
A) 480 counts/min
B) 240 counts/min
C) 120 counts/min
D) 60 counts/min
E) 30 counts/min
Correct Answer:
Verified
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