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29 March, 05:00

An artifact contains one-fourth as much carbon-14 as the atmosphere. how old is the artifact

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  1. 29 March, 05:14
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    The half life of Carbon-14 is 5,730 years

    To contain 1/4 of the value, 2 half-lives must have passed.

    The artifact is: 2 x 5,730

    = 11,460 years older than the atmosphere.
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