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A particular substance decreases in mass from 650 grams to 100 grams over the course of exactly two weeks. How long is the half-life of

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A particular substance decreases in mass from 650 grams to 100 grams over the course of exactly two weeks. How long is the half-life of the substance. State your answer in days, hours and minutes. [5 The length of the half-life is approximately days, hours, and minutes

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