# exc

1. ### Need help logarithmic exc.

Im stuck on this study question. It says. Iodine-135 has a half life of 8 days. How long would it take for 28kg of iodine-135 to decay to 200g? The answer s 57.03 days. Could someone explain how this answer was gotten? The unit is logarithmic funtions so I assume that they are...