A sample of a radioactive isotope had an initial mass of 540 mg in the year 1991 and decays exponentially over time. A measureme
2 answers:
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Answer: Option 'd' is correct.
Step-by-step explanation:
Since we have given that
Margin of error = 0.5 years
Standard deviation = 5
At 90% confidence, z = 1.645
We need to find the minimum size of the sample they must take.
So,
Hence, Option 'd' is correct.