Answer:
Step-by-step explanation:
x^2 = 64
√x² = √64
x = 8, -8
answer is B
 
        
             
        
        
        
Answer:
Confidence interval:  (1760,1956)
Step-by-step explanation:
We are given the following information in the question:
Sample size, n = 81
Sample mean = 

Population standard deviation =

Confidence Level = 95%
Significance level = 5% = 0.05
Confidence interval:

Putting the values, we get,


 
        
             
        
        
        
Answer:
3
2,-8
Step-by-step explanation:
this should be the two answers
 
        
             
        
        
        
Answer:
11:05
Step-by-step explanation: