Radioactive half-life — UPSC Physics Optional IFoS 2019 Paper II

Calculate the decay rate of {}^{14}\text{C} per gram of carbon in a living organism, assuming the ratio {}^{14}\text{C} / ^{12}\text{C} = 1\cdot 35 \times 10^{-12}. The half-life of {}^{14}\text{C} is 5730 years.