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A piece of charcoal used for cooking is found
at the remains of an ancient campsite. A
1.19 kg sample of carbon from the wood has
an activity of 2340 decays per minute.
Find the age of the charcoal. Living mate-
rial has an activity of 15 decays/minute per
gram
of carbon present and the half-life of 14C
is 5730 y.
Answer in units of y.

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