How much of a sample of radioisotope remains after two half lives?

50% remains after one half-life, <b>25%</b> remains after two half-lives, and 25% remains after fifteen years. Oct 20, 2020

Question

50% remains after one half-life, 25% remains after two half-lives, and 25% remains after fifteen years. Oct 20, 2020

Hagrid P Hazard · Accepted Answer

50% remains after one half-life, 25% remains after two half-lives, and 25% remains after fifteen years. Oct 20, 2020