Answer: ($3.532, $4.166)
Step-by-step explanation:
Given : Significance level : 
Critical value : 
Sample size : n= 157
Sample mean : 
Standard deviation : 
The confidence interval for population mean is given by :_
Hence, the 0% confidence interval for the average tip given at this restaurant = ($3.532, $4.166)
Answer: the answer would be B
Step-by-step explanation:
I just had this question on my test and got it right :)
Find: 1) the area of a circle of diamter 5 feet and radius 5/2 feet.
2) the area of a triangle with height 4 ft and base 6 ft.
Add these 2 results together: pi*(5/2)^2 + (1/2)(6)(4) ft
The trick here is to recognize basic shapes, find their areas separately and add the results.
The answer would be 28 because....
First, you would multiply 80 and .65 (changed the percentage to decimal) which is 52
Then, subtract 80 and 52 to get 28
