A skull believed to belong to an ancient human being has a carbon-14 decay rate of 6.50 dis/min.g of carbon. If living orgains have a decay rate of 15.3 dis/min,g of carbon, how old is the skull? (half-life of C-14 is 5730 years) a. -6134 years b.-7080 years C. -10235 years O d. -11235 years

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