Mathematics, 28.09.2019 20:00 ehsaangaminglegend

The half-life of a radioactive kind of europium is 9 years. how much will be left after 18 years, if you start with 40 grams of it ?

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The half-life of a radioactive kind of europium is 9 years. how much will be left after 18 years, if...

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