Mathematics, 21.04.2021 20:00, igsgymnast

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?
A. 1.5 grams
B. 2.5 grams
C. 3.5 grams
D. 4.5 grams

Answers: 3

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A scientist has 20 grams of the radioactive isotope sodium-24. The isotope decays exponentially as s...