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I need this question to be solved in 30 mintues! Please show work! 3. fA 6 kg sample of a radioactive substance decays to 2

I need this question to be solved in 30 mintues! Please show work!

3.

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\fA 6 kg sample of a radioactive substance decays to 2 kg in 5 hours. What is the half-life of this substance in hours? Round your answer to the nearest HUNDREDTH of an hour. 0 A. 5.49 O B. 1.10 O C. 7.92 O D. 4.55 O E. 3.15

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