1. The problem statement, all variables and given/known data Suppose that a given radioactive element A decomposes into a second radioactive element B, and that B in turn decomposes into a third element C. The amount of A present is initially a0. The amounts of A and B present at a later time t are a and b respectively. If k1 and k2 are the reaction rates for the two chemical reactions, find b as a function of t. Hint: Consider k1 and k2 to be positive, so, for example, one of the equations that you need is da/dt = rate in − rate out = −k1a. Also, you may assume k1 =/= k2. 2. Relevant equations rate = kAmBn? halflife = ln 2 / lambda ? 3. The attempt at a solution Well this isnt like any other radioactive decay problem Ive seen. Usually we're given initial conditions, or the half life, or something! I dont even know where to begin... please help!