# Carbon 14 dating or how old are those mms

By comparing the ratio of carbon-14 to carbon-12 in a decaying sample to the known ratio in the atmosphere, the date the plant or animal died can be approximated.Since the half-life of carbon-14 is 5,730 years, the formula for the amount of carbon-14 remaining after Out of necessity, we neglect here the many details that a scientist takes into consideration when doing carbon-14 dating, and we only look at the basic formula.Most of the carbon on Earth is carbon-12, which has an atomic weight of 12 and is not radioactive.Scientists have determined the ratio of carbon-14 to carbon-12 in the air for the last 60,000 years, using tree rings and other organic samples of known dates—although the ratio has changed slightly over the centuries.To describe these numbers, we often use orders of magnitude.The order of magnitude is the power of ten, when the number is expressed in scientific notation, with one digit to the left of the decimal.As long as a plant or animal is alive, the ratio of the two isotopes of carbon in its body is close to the ratio in the atmosphere.When it dies, the carbon-14 in its body decays and is not replaced.

We may use the exponential growth function in applications involving doubling time, the time it takes for a quantity to double.As we mentioned above, the time it takes for a quantity to double is called the doubling time.Given the basic exponential growth equation Recent data suggests that, as of 2013, the rate of growth predicted by Moore’s Law no longer holds.Carbon-14 is a radioactive isotope of carbon that has a half-life of 5,730 years.It occurs in small quantities in the carbon dioxide in the air we breathe.