Answer:
554 executives should be surveyed.
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 Z-table as such z has a p-value of
.
That is z with a pvalue of
, so Z = 1.96.
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.
Standard deviation of 3 hours.
This means that 
The 95% level of confidence is to be used. How many executives should be surveyed?
n executives should be surveyed, and n is found with
. So






Rounding up:
554 executives should be surveyed.
Answer:
Your answer is correct in the image
there is no need to change that
Answer:
What kind of angles?
Step-by-step explanation:
What is your question?
If one gallon equals to 16 cups, then 16 * 10 will be your answer.
10 * 16 = 160
The reflected figure will appear in quadrant 3, C.