Presume that living organisms have a carbon-14 decay rate

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Explain a mammoth skeleton has a carbon-14 decay rate of 0.49 disintegrations per minute per gram of carbon (0.49 dis/min gC). While did the mammoth live? Presume that living organisms have a carbon-14 decay rate of 15.3 dis/min gC as well as that carbon-14 has a half-life of 5730 yr)

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