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A Certain Radioactive Isotope Decays from 70 Grams to 45

Question 63

Multiple Choice

A certain radioactive isotope decays from 70 grams to 45 grams in 27 years. What is the half-life of the isotope?

A) 40.16 years
B) 42.36 years
C) 48.31 years
D) 50.02 years
E) 36.25 years

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