Posted by **Yvonne** on Monday, April 16, 2012 at 2:14pm.

An artifact was found and tested for its carbon-14 content. If 88% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon-14 has a half-life of 5,730 years.

- College Math -
**Steve**, Monday, April 16, 2012 at 3:42pm
If you start with amount P, then after t years, R, the fraction remaining, is

R = 2^(-t/5730)

See how that works? Every 5730 years, the power of 2 goes down by 1.

2^(-t/5730) = .88

-t/5730 = ln(.88)/ln(2) = −0.321928095

t = 5730 * 0.321928095

t = 1844.64798435

or, to the nearest 100 years, 1800.

## Answer this Question

## Related Questions

- math - An artifact was found and tested for its carbon-14 content. If 83% of the...
- math - An artifact was found and tested for its carbon-14 content. If 83% of the...
- math - An artifact was found and tested for its carbon-14 content. If 76% of the...
- math - An artifact was found and tested for its carbon-14 content. If 81% of the...
- math - An artifact was found and tested for its carbon-14 content. If 88% of the...
- Math - An artifact was found and tested for its carbon-14 content. If 88% of the...
- algebra - An artifact was found and tested for its carbon-14 content. If 84% of ...
- algebra - An artifact was found and tested for its carbon-14 content. If 84% of ...
- algebra - An artifact was found and tested for its carbon-14 content. If 79% of ...
- Algebra - An artifact was found and tested for its carbon-14 content. If 77% of ...

More Related Questions