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Biology 20 Online
OpenStudy (anonymous):

Radiometric dating is based on knowing A. how quickly certain isotopes decay B. the half-lives for certain isotopes C. how to measure how much of an isotope is left in a sample D. all of the above

OpenStudy (misssmartiez):

"radiometric dating is base on the half life of the radioactive atoms." - http://www.answers.com/Q/What_is_radiometric_dating_based_on So, basically, every answer is related, so I would say all of above.

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