Answer:
x = 60°
Step-by-step explanation:
G= 90°
30 + 90 = 120
180 - 120 = 60
Answer:
a) A sample size of 5615 is needed.
b) 0.012
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of
, and a confidence level of
, we have the following confidence interval of proportions.

In which
z is the zscore that has a pvalue of
.
The margin of error is:

99.5% confidence level
So
, z is the value of Z that has a pvalue of
, so
.
(a) Past studies suggest that this proportion will be about 0.2. Find the sample size needed if the margin of the error of the confidence interval is to be about 0.015.
This is n for which M = 0.015.
We have that 






A sample size of 5615 is needed.
(b) Using the sample size above, when the sample is actually contacted, 12% of the sample say they are not satisfied. What is the margin of the error of the confidence interval?
Now
.
We have to find M.



The least common denominator would be 9, because
a. you can't take 3 out of two in 2/9
b. you can multiply 2/3 by 3 to make 6/9
so the LCD is 9
Answer:
2
degree is highest exponent in equation and 2x² has 2 and is highest