Mathematics, 21.04.2020 18:40 smuindi3293
The half-life of a radioactive element is 130 days, but your sample will not be useful to you after 80% of the radioactive nuclei originally present have disintegrated. About how many days can you use the sample? Round to the nearest day.
Answers: 1
= initial amount
.......(1)
.........(2)
, Â 
days.
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The half-life of a radioactive element is 130 days, but your sample will not be useful to you after...
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