Solve the problem.When a radioactive substance decays, the number N of grams remaining from an initial mass N0 (in grams) is given by 
where n is the number of half-lives for which the substance has decayed. Given that the half-life for tritium is 15 years, find the rate in (grams/half-life) at which a 91-gram initial mass of radioactive tritium decays after 48 years.
A. -9.9 g/half-life
B. -6.86 g/half-life
C. -3.62 g/half-life
D. -63.07 g/half-life
Answer: B
Mathematics
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