Answer:

Step-by-step explanation:
Given

-- City C
--- City K
Required
Determine the 90% confidence interval
This is calculated using:

Calculating 




For a 90% confidence level, the z-score is 1.65. So:

Calculating the standard deviation 

So:


So:


Answer
A 1 3/8
Step-by-step explanation:
Just subtract bro
Look at each term. How does the next one change? what is added?
The answer is 6, because there is an increase of 6 for each term
Answer:
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The radius is half the diameter, so the formula would be r=d divided by 2