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An initial sample of 246 g of a radioactive substance decays according to the function A t 246e 0 013t where t is given in

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An initial sample of 246 g of a radioactive substance decays according to the function A t 246e 0 013t where t is given in years a How many grams of the substance will remain after 72 years Round your answer to one decimal place b What is the half life of the substance Round your answer to one decimal place

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