Carbon-14 dating is a first order process used to determine the age of artifacts that were made from organic (carbon-containing) materials. Given a rate constant of 1.21 x 10-4 years-1, what is the half life of carbon-14 (i.e., how many years will it take for the initial concentration of carbon-14 in a sample to be reduced to one-half the initial amount)? (answer in 4 significant figures)

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