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A radioactive isotope is found 80 \% of its of initial amount after 1 month. What percentage of the originnal sample can be found after three months ?

 

Option: 1

5.12%


Option: 2

51.2%


Option: 3

70%


Option: 4

40%


Answers (1)

best_answer

As equal fraction decay in equal periods of time, so fraction of sample remaining after 3 months =(0.8)^{3}=0.512

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chirag

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