Question

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Element X is a radioactive isotope such that every 30 years, its mass decreases by half. Given that the initial mass of a sample of Element X is 1400 grams, how long would it be until the mass of the sample reached 800 grams, to the nearest tenth of a year?

Answer 1

93.3

Explanation:

You would divide the years by .5

and divide that answer by 30

Answer 2

24.2

Explanation:

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