Living Matter Has 1

question 30

Multiple Choice

Living matter has 1.3 × 10^-10% of its carbon in the form of ¹⁴C which has a half-life of 5730 yr. 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 yr
• B)10,900 yr
• C)11,500 yr
• D)7,600 yr
• E)6,400 yr

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