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Mathematics, 18.03.2021 02:10 hany90

Element X is a radioactive isotope such that every 26
years,
its mass
decreases by half. Given that the initial mass of a sample of Element X is 680
grams, how much of the element would remain after 19 years, to the nearest
whole number?

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Element X is a radioactive isotope such that every 26
years,
its mass
decreases b...
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