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Question is in picture
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4 votes
Question is in picture

Question is in picture-example-1
User Pretty Good Pancake
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7.5k points

1 Answer

4 votes

Answer:

30

Step-by-step explanation:

I believe it's 30 because half of 24 is 12 and that is its half life. And as you know it took 30 minutes to get there.

User Cotten
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