1. The problem statement, all variables and given/known data A sample containing carbon-14 has 16000 decays per minute. If the half life of carbon-14 is 5730 years. Aproximately how many decays per minute would be occurring after another 50 000 years. Answer: approximately 40 decays per minute. 2. Relevant equations N= No x e^-λt T=in2/λ A= λN ( A is the decay rate of sample I.e number of decays per second) 3. The attempt at a solution Calculated the value of λ first from in2/5730 and got 1.2 x 10^-4. Then tried to plug it into A= λN and tried to get the value of N by substituting the first activity of 16000. From here I am stuck because I realised even if I find N and plug it back into the formula I'll be getting the same result. Which makes me confused about the whole question because I would have thought that the decay rate would be constant for a particular sample. Any help would be greatly appreciated. Thanks in advance.