41. Given a sample of radium-226 having a half-life of 4 days, find the probability that a nucleus
disintegrates after two half-lives.
(A) 1/2
(B) 1/4
(C) 2/3
(D) 3/4
(E)1/3
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統計: A(1), B(7), C(0), D(17), E(0) #3081281
統計: A(1), B(7), C(0), D(17), E(0) #3081281