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3. The formula for exponential decay is A = Aockt. (a) Vanadium-49 has a half-life of 330 days. Find the value of k in a

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3. The formula for exponential decay is A = Aockt. (a) Vanadium-49 has a half-life of 330 days. Find the value of k in a model of exponential decay for Vanadium-49. (b) A model for the amount of gold-196 after t days is A = Age--1221t. How many days will it take for 10% of an initial sample to remain

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