Complementary angles
Explanation:
Completely angles are two angles that equal 90°
This is a perfect example of that
Answer:
Step-by-step explanation:
Assuming conditions are met, the formula for a confidence interval (CI) for the difference between two population proportions is 
where 
and 
are the sample proportion and sample size of the first sample, and 
and 
are the sample proportion and sample size of the second sample.
We see that 
and 
. We also know that a 98% confidence level corresponds to a critical value of 
, so we can plug these values into the formula to get our desired confidence interval:
Hence, we are 98% confident that the true difference in the proportion of people that live in a city who identify as a democrat and the proportion of people that live in a rural area who identify as a democrat is contained within the interval {-0.2941,-0.0337}
The 98% confidence interval also suggests that it may be more likely that identified democrats in a rural area have a greater proportion than identified democrats in a city since the differences in the interval are less than 0.
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Formula
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Circumference = πD
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Find Diameter
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10π = πD
D = 10 ← divide by π on both sides
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Find Radius
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Radius = Diameter ÷ 2
Radius = 10 ÷ 2
Radius = 5
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Answer: Radius = 5 units
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