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Element X is a radioactive isotope such that every 81 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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8 votes

Answer:

Explanation:

User Adam Tindale
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1 vote

Answer:

15?

Explanation:

User Ewald
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