A. 250days
B. 150days
C. 300days
D. 200days
Correct Answer:
Option A – 250days
Explanation
Since 1/32, is the fraction left of any radioactive material after 5half lives, that is:
1/32= (1/2)5. Thus if a half-life is 50 days, 5 half-lives will be 50 x 5= 250 days
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