GEOLOGY

Detailed explanation-1: -An archaeological artifact containing wood had only 80% of the 14C found in a living tree.

Detailed explanation-2: -The currently accepted value for the half-life of 14C is 5, 730 years. This means that after 5, 730 years, only half of the initial 14C will remain; a quarter will remain after 11, 460 years; an eighth after 17, 190 years; and so on.

Detailed explanation-3: -The time it takes for 14C to radioactively decay is described by its half-life. C has a half-life of 5, 730 years. In other words, after 5, 730 years, only half of the original amount of 14C remains in a sample of organic material. After an additional 5, 730 years–or 11, 460 years total–only a quarter of the 14C remains.

Detailed explanation-4: -Hence, the age of the sample is 1845 years.

Detailed explanation-5: -The isotope Carbon-14 has a half-life of 5, 730 years.