ABR Practice Exam Question 1: Answer

A(t) = A(0)*Exp(-0.693t/T) , where A(t) is activity at time t, A(0) is initial activity, and T is the half-life of the radioactive material. By integrating this equation from t=0 to t=10,  t=0 to t=60, and  t=0 to t=80, the fraction of the given dose can be calculated. Therefore, the answers are: 11%, 50% and 60%.

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