Mathematics, 25.06.2021 02:30 jaylen63

Select the correct answer. 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?
А. 1.5 grams
B. 2.5 grams
C. 3.5 grams
D. 4.5 grams

Answers: 1

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