Question 1196893
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Some comments about the problem and the other responses you have received....<br>
(1) Your decay rate of 0.000124 corresponds to a carbon 14 half life of 5590 years.  Internet sources place the half life at 5730 plus or minus 30 years.<br>
(2) Radioactive decay is a statistical process; the amount remaining does not follow a smooth decaying exponential curve.  Any age obtained using carbon 14 dating can only be treated as approximate.  Any answer that gives a carbon 14 age should show no more than about 3 significant figures.<br>