Question 1
An artifact is discovered at a certain site. If it has 57% of the carbon-14 it originally contained, what is the approximate age of the artifact to the nearest year? (carbon-14 decays at the rate of 0.0125% annually.)
◦ 4497 years
◦ 4560 years
◦ 1953 years
◦ 3440 years
Question 2
An artifact is discovered at a certain site. If it has 72% of the carbon-14 it originally contained, what is the approximate age of the artifact? (carbon-14 decays at the rate of 0.0125% annually.) (Round to the nearest year.)
◦ 1141 yr
◦ 2628 yr
◦ 5760 yr
◦ 2240 yr