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A radioactive sample has a half-life of 10 minutes. What fraction of the sample is left after 40 minutes? A. 1/2 B. 1/4 C. 1/8

A radioactive sample has a half-life of 10 minutes. What fraction of the sample is left after 40 minutes?

A. 1/2

B. 1/4

C. 1/8

D. 1/16

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