The half-life of radon-222 is 2.8 days. A homeowner used a radon test-kit to sample the air in his home, but forgot to send it for processing for 30 days. If the level of radon was actually 100 counts, what value would be reported by the test lab?
A) 94 counts
B) 17 counts
C) 9.3 counts
D) 1.5 counts
E) 0.060 counts
Correct Answer:
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