Mathematics, 28.12.2020 06:50, dillondelellis2006

Element X decays radioactively with a half life of 9 minutes. If there are 720 grams of Element X, how long, to the nearest tenth of a minute, would it take the element to decay to 255 grams?

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Element X decays radioactively with a half life of 9 minutes. If there are 720 grams of Element X, h...