Answer:
The sample size required is 2500.
Step-by-step explanation:
z-score:
In function of the margin of error M, the z-score is given by:

In this question, we have that:

So






The sample size required is 2500.
Hey there
That's easy
Divide 2750 by 40 and a good estimate would be 68 dollars
Hope this helps
Answer:
1200
Step-by-step explanation:
the information on it
The exponent indicates how many times the number is used as a factor