Answer: 
Step-by-step explanation:
Given : Sample size : 
Sample mean : 
Standard deviation : 
Significance level : 
Critical value : 
Formula to find the confidence interval for population mean :-

Hence, a 90% confidence interval estimate of the population mean of all students = 
You would do $2.00 ÷ 3 = $0.67
10 × $0.67 = $6.70
10 apples would cost $6.70
HOPE THIS HELPED :)
Answer:
option 4
Step-by-step explanation:
|a| represents Absolute value, it is the distance from zero that a number is on the number line. And we know distance cannot be negative.
So,


The perimeter is 47cm. The area would be 111cm^2. Hope this helped, could I possibly get brainliest?