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.
The answer is C for that question
-$12 -$5= x
x = value Rita has left when she went to the mall
Answer:
x = -9, -3
Step-by-step explanation:
x = -3, -9