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OpenStudy (anonymous):
When the Trilobite in Strata-4 was analyzed for a radioactive isotope with a half life of 100 Million Years it was found to contain 11.7% of parent isotope. What is its radiometric age? B. 15.5 Million Years. C. 155 Million Years. D. 309 Million Years.
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OpenStudy (anonymous):
D
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