Let's assume x=15. 38x=100×15=1,500. 
. x=39.472 which is rounded to 39%
A cylinder has a radius of X +2 and a height of X +4 which polynomial in standard form best describes the total volume of the cy
1 answer:
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Answer:
609
Step-by-step explanation:
Standard deviation = = $30
Margin of error = E = $2
Confidence level = 90%
Since the distribution is said to be normal, we will use z scores to solve this problem.
The z score for 90% confidence level = z = 1.645
Sample size= n = ?
The formula to calculate the margin of error is:
Using the values in above equation, we get:
This means, the minimum number of observations required is 609