Answer:
CI = (70.861 , 94.418)
Step-by-step explanation:
In order to determine the 90% confidence interval you use the following formula (for a population approximately normal):
 (1)
    (1)
 : mean = 82.64
: mean = 82.64
σ: standard deviation = 14.32
n: sample = 4
α: tail area = 1 - 0.9 = 0.1
Z_α/2 = Z_0.05: Z factor =  1.645
You replace these values and you obtain:

The confidence interval will be: 

The 90% confidence interval is (70.861 , 94.418)
 
        
             
        
        
        
Answer:
I think it would be 50 millimeters per second
Step-by-step explanation:
600/30
 
        
                    
             
        
        
        
The correct answer will be -4x - 10 which is A. X subtracts to the other side and makes it -4x, then 6 +-4 = -10
        
             
        
        
        
Answer:
None of the above
Step-by-step explanation:
The common ratio 10 means we are starting with 4.5 and multiplying that by 10 each time:
4.5*10=45
45*10=450
450*10=4500
As you can see, this does not match any of the answers
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