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Mathematics, 26.05.2021 20:30 insomniacnana2

Element X decays radioactively with a half life of 8 minutes. If there are 690 grams of Element X, how long, to the nearest tenth of a minute, would it take the element to
decay to 7 grams?
I need help please

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Element X decays radioactively with a half life of 8 minutes. If there are 690 grams of Element X,...
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