Question

Decay (calculus problem)

Answer 1

Explanation:

If the half-life is k days, then you have

(1/2)^(300/k) = 0.696

k = 573.788

makes sense, since 69.6% is greater than 50%

Now solve for t in

(1/2)^(t/573.788) = 1/3

t = 909.432 days

makes sense -- about 1.5 half-lives