![Princeton Review mentions both half-life equations in their G-Chem book. Do I need to know both for the MCAT or am I good to just memorize the bottom one? Because TPR says Princeton Review mentions both half-life equations in their G-Chem book. Do I need to know both for the MCAT or am I good to just memorize the bottom one? Because TPR says](https://preview.redd.it/et3kf2kerb981.png?auto=webp&s=827fe756ab8292a63e8461280bfab54217c74a6b)
Princeton Review mentions both half-life equations in their G-Chem book. Do I need to know both for the MCAT or am I good to just memorize the bottom one? Because TPR says
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Using the half-life formula for more complex problems | Science, Chemistry, Nuclear Chemistry | ShowMe
![Radioactive Decay formula: Radioactive Half Life = 0.693 / Radioactive Decay Constant | Physics topics, Science themes, Physics Radioactive Decay formula: Radioactive Half Life = 0.693 / Radioactive Decay Constant | Physics topics, Science themes, Physics](https://i.pinimg.com/736x/94/f7/4e/94f74ee27559100c5e86f5fef080f3e4--half-life-radioactive.jpg)