Radioactive Decay: Fermium-253 has a half-life of 3.00 days. If a sample of fermium originally has 7.37 × 107 nuclei, how long will it take for there to be only 3.36 × 106 fermium-253 nuclei left in this sample?
A. 2.75 days
B. 9.80 days
C. 13.4 days
D. 15.7 days
E. 58.6 days
Answer: C
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