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Mathematics, 03.05.2020 14:15 cthompson1107

A certain isotope has a half-life of 9 hours. If the
initial mass of the isotope is 20.8 mg, what is the
mass after 63 hours?
a. 0.1625 mg
b. 0.040625 mg
c. 5.2 mg
d. 1.3 mg

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A certain isotope has a half-life of 9 hours. If the
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