The half-life of carbon-14 is about 5,730 years.If an ancient leather strap is about 11,500 years old,what percentage of carbon-14 in a now-living object remains in the strap?

Question

Quizplus · Accepted Answer

After one half-life (5,730 years), half of the original carbon-14 amount would remain. After two half-lives (11,460 years), only one-fourth of the original carbon-14 amount would remain. Since the leather strap is 11,500 years old (just over two half-lives), only about 25% of its original carbon-14 content would remain. Therefore, the best choice is (C), 25%.

The Half-Life of Carbon-14 Is About 5,730 Years