Mathematics, 25.08.2019 08:00, widnickab

Someone and explain the first one so the half life of a radioactive kind of potassium is 12 hrs . how much will be left after 36 hrs, if you start with 64 grams of it? so i did a=64(1/2)^36 power is that the accurate form i need asap
btw this is exponential decay

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Someone and explain the first one so the half life of a radioactive kind of potassium is 12 hrs ....