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Living Matter Has 1

Question 49

Multiple Choice

Living matter has 1.3 × 10-10 % of its carbon in the form of 14C which has a half-life of 5730 y. A mammoth bone has a 300-g sample of carbon separated from it, and the sample is found to have an activity of 20 decays per second. How old is the bone?


A) 15,000 y
B) 10,900 y
C) 11,500 y
D) 7600 y
E) 6400 y

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