Respuesta :
10.2 hours is equivalent to three half-lives, so after 10.2 hours, the mass of the sample would have decayed by half three times over. If one starts with 100 mg of the sample, then after three half-lives, there would be 100(0.5)³ = 12.5 mg of the sample remaining.
Thus, the correct answer choice here would be D.
Thus, the correct answer choice here would be D.
i am here to confirm that it is D 12.5 bc most of the times brainly gives me wrong answers so yeah it is D
