Members at a gym pay $9 per class plus a one-time $120 membership fee. Non-members pay $15 per class. How many classes would a m
2 answers:
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Given
The numbers, 1/2, 1/8, and 1/10.
To find: The least common denominator.
Explanation:
It is given that,
1/2, 1/8, and 1/10 .
Then,
Therefore, the LCM is,
Hence, the least common denominator is 40.
Answer:
190
Step-by-step explanation:
Data provided in the question:
Confidence level = 99%
Therefore,
α = 1% = 0.01
[ from standard normal table ]
z-value for = 2.58
Margin of error, E = $0.06
Standard deviation, σ = $0.32
Now,
n =
Here,
n is the sample size (or the minimum number of gas stations )
on substituting the respective values, we get
=
=
= 13.76²
= 189.3376 ≈ 190
Hence,
minimum number of gas stations that she should include in her sample is 190