Answer:
7.068583471 km ^2
Step-by-step explanation:
pi x radius² is area
pi x 1.5² = the answer
30.
3/4 is equal to 75%, so take 75% of 40 by multiplying .75 by 40 to get 30
Answer: 1.509
Step-by-step explanation:
The formula of Margin of Error for (n<30):-

Given : Sample size : n= 22
Level of confidence = 0.99
Significance level : 
Using the t-distribution table ,
Critical value : 
Standard deviation: 
Then, we have

Hence, the margin of error for a 99% confidence interval for the population mean =1.509
CQE is a right angle. Hope this helps!!!