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15-01-2024
Mathematics

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A scientist has 20 grams of the radioactive isotope sodium-24. The isotope decays exponentially as shown in the table. Time (hours) Mass (grams) 5 15.9 10 12.6 15 10 20 7.9 25 6.3 30 5 Approximately what will the mass of the isotope be after 45 hours?

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