Description
The amount of 14C in an old, isolated sample of vegetation is 0.809 that expected from a present day sample with an equivalent carbon content. Calculate the age of the old sample in years.
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Explanation & Answer
The half life of C14 is 5730 years.
Assuming the age of this sample is t.
Then (1/2)^(t/5730)=0.809
t/5730=log 0.809/log 0.5=0.306
t=5730x0.306=1753 years
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