clarabear23 clarabear23

28-03-2019
Mathematics

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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 you start with 40 grams of it ?

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TrueGrandMaster TrueGrandMaster

28-03-2019

Answer:There will be 10 grams left because you subtract half of the current amount from it every 9 years.

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