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The half-life of Carbon-14 is about 5700 years. You have found a fossil in sedimentary rocks
that have 1/128 the normal (modern) expected ratio of Carbon-14C. Based on this information,
you estimate that it is about _______ years old.
44
5700
39,900
729,600
Solution
The fossil in 39,900 years old. At 1/128 the carbon-14 of living organisms, it has gone through
seven half-lives of carbon-14 (5700 years x 7 = 39,900 years)

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The half-life of Carbon-14 is about 5700 years. You have found a fos.pdf

  • 1. The half-life of Carbon-14 is about 5700 years. You have found a fossil in sedimentary rocks that have 1/128 the normal (modern) expected ratio of Carbon-14C. Based on this information, you estimate that it is about _______ years old. 44 5700 39,900 729,600 Solution The fossil in 39,900 years old. At 1/128 the carbon-14 of living organisms, it has gone through seven half-lives of carbon-14 (5700 years x 7 = 39,900 years)