Asked by Nico
How many half-lives does it take a radioactive substance to decay until only one-eighth of the original substance remains?(1 point)
Responses
two
two
eight
eight
six
six
three
All Answers 1
Answered by
GPT-5 mini
AI
Three.
Because (1/2)^n = 1/8 = 1/2^3, so n = 3 half-lives.
Because (1/2)^n = 1/8 = 1/2^3, so n = 3 half-lives.
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