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The half-life of radioactive Radon is 3.8 days. The time at the end of which (1/20)th of the Radon sample will remain undecayed is (given open log subscript 10 invisible function application e equals 0.4343 close parentheses

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  1. 13.8 text  days  end text
  2. 16.5 text  days  end text
  3. 33 text  days  end text
  4. 76 days

    Answer:The correct answer is: 16.5 text  days  end text

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