Answer:
c) .22
Step-by-step explanation:
We have that to find our 
level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of 
.
So it is z with a pvalue of 
, so 
Now, find the margin of error M as such
In which 
is the standard deviation of the population and n is the size of the sample.
In this question:
Then
Answer:
you could have used a calculator
Step-by-step explanation:
-2.8
Answer:
Area=615.75
Step-by-step explanation:
A=πr2
Seriously I have helped you twice in 5 minutes.
Answer:
B or E this one is alittle tricky.
