Mathematics, 26.10.2020 05:00, sarah7484

Element X is a radioactive isotope such that every 18 years, its mass decreases by half. Given that the initial mass of a sample of Element X is 500 grams, how long would it be until the mass of the sample reached 210 grams, to the nearest tenth of a year?

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Element X is a radioactive isotope such that every 18 years, its mass decreases by half. Given that...