When a 500-mg medical dosage has degenerated to approximately 63 mg of its original, how many half-lives have passed?
Let n be number of half lives
Then:
N/No = (1/2)^n
63/500 = (1/2)^n
1/8 = (1/2)^n
(1/2)^3 = (1/2)^n
n = 3
Answer: 3
When a 500-mg medical dosage has degenerated to approximately 63 mg of its original, how many...
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