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approximate age of the artifact using carbon decay

In the formula A=I e^(kt),
A is the amount of material remaining from an initial amount I at a given time t and k is negative constant determined by the nature of the material.
If it has 53% of the carbon it originally contained, what is the approximate age of the artifact? (carbon decays @ a rate of 0.0125% annually.) Round to the nearest year.

What formula do I use??
4240 yr
5079 yr
2206 yr
3760 yr

Solution Summary

The solution shows how to calculate the age of the artifact using logarithmic and exponential decay.

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