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Suppose that the amount, in grams, of polonium 219 present in a given sample is determined by the function defined by A(t)=406e^-0.032tm where t is...

Suppose that the amount, in grams, of polonium 219 present in a given sample is determined by the function defined by A(t)=406e^-0.032tm where t is the time in years. Find the amount present in a sample of 406 grams after 25 years

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