Answer:
19,23
Step-by-step explanation:
9+x-7≥ 21
Combine like terms
2+x≥21
Subtract 2 from each side
2+x-2 ≥21-2
x≥19
Any number greater than or equal to 19
 
        
             
        
        
        
Answer:
7837
Step-by-step explanation:
1000 + 6901 - 64 = ?
=7837
 
        
             
        
        
        
Answer:
$12
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
73/80
Step-by-step explanation:
multiples of 11 between 1 and 80 are 11,22,33,44,55,66,77
number of terms=7
P(multiple of 11)=7/80
P(not a multiple of 11)=1-7/80=73/80
 
        
             
        
        
        
Answer: (20.86, 22.52)
Step-by-step explanation:
Formula to find the confidence interval for population mean :-

 , where  = sample mean.
 = sample mean.
z*= critical z-value
n= sample size.
 = Population standard deviation.
 = Population standard deviation.
By considering the given question , we have


n= 58
Using z-table, the critical z-value for 95% confidence = z* = 1.96
Then, 95% confidence interval for the amount of time spent on administrative issues will be :





Hence, the 95% confidence interval for the amount of time spent on administrative issues = (20.86, 22.52)