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The Half- Life of Cobalt- 60 Is 5

Question 92

Multiple Choice

The half- life of cobalt- 60 is 5.2 yr. How many milligrams of a 2.000- mg sample remains after 6.55 years?

A) 1.588
B) 1.163
C) 0.837
D) 3.23 × 10^-¹⁵
E) 4.779

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