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# A radioactive isotope has a half-life of 8 days. What fraction of the atoms will...

### Question

A radioactive isotope has a half-life of 8 days. What fraction of the atoms will remain after 72 days?

A) 9.766 × 10-4

B) 1.736 ×10-3

C) 1.953 ×10-3

D) 3.472 × 10-3

E) 3.906 x 10-3