Mathematics, 15.12.2021 17:20 nicollexo21

Element X is a radioactive isotope such that every 21 years, its mass decreases by half. Given that the initial mass of a sample of Element X is 1800 grams , how much of the element would remain after 28 years , to the nearest whole number?

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Element X is a radioactive isotope such that every 21 years, its mass decreases by half. Given that...