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Solution: The isotope cobalt-60 has a half life of 5.26 years. How long would it take for the decay to be 38.5% complete? a. 3.15 years b. 1.60 years c. 5.02 years d. 7.24 years e. 3.69 years

Problem

The isotope cobalt-60 has a half life of 5.26 years. How long would it take for the decay to be 38.5% complete?

a. 3.15 years

b. 1.60 years

c. 5.02 years

d. 7.24 years

e. 3.69 years