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27 September, 12:36

A humanoid skeleton is found buried in the ashes of a volcano that erupted between 10,000 and 12,000 years ago. when scientists use absolute dating techniques to obtain an age of the fossil, approximately how much carbon-14 isotope will remain?

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  1. 27 September, 14:00
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    From reliable sources in the internet, the half-live of carbon-14 is given to be 5,730 years. In a span of 10,000 to 12,000 years, there are almost or little more than 2 half-lives. Thus, there should be

    A (t) = A (0) (1/2) ^t

    where t is the number of half-lives, in this case 2. Thus, only about 1/4 of the original amount will be left.
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