Chemistry

Problem

Carbon-14 has a half-life of 5{,}730 years. Approximately how many years must pass before 80\% of an initial sample remains? a)

2.29\times 10^{3}\ \text{yr}

1.28\times 10^{3}\ \text{yr}

1.84\times 10^{3}\ \text{yr}

3.68\times 10^{3}\ \text{yr}