SOLUTION: This exercise uses the radioactive decay model. A wooden artifact from an ancient tomb contains 55% of the carbon-14 that is present in living trees. How long ago was the artif

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Question 1119970: This exercise uses the radioactive decay model.
A wooden artifact from an ancient tomb contains 55% of the carbon-14 that is present in living trees. How long ago was the artifact made? (The half-life of carbon-14 is 5730 years. Round your decay rate, r, to 6 decimal places. Then round your answer to the nearest whole number.)
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


is the number of atoms remaining at time . is the original number of atoms. is the half-life.



But and the half-life is 5730 years, so



But we are given that 55% of the Carbon-14 remains, so , hence:



Solve for


John

My calculator said it, I believe it, that settles it