Answer:
7
Step-by-step explanation:
 
        
             
        
        
        
Answer:
no
Step-by-step explanation:
no
 
        
             
        
        
        
Answer:
10
e
^10
x
Step-by-step explanation:
Find the derivative using the chain and power rules.
 
        
             
        
        
        
Answer:
$74,600
Step-by-step explanation:
-Given the probability is 2.5%, mean=$55,000 and standard deviation= $10,000
-We find the z value of 2.5%

Hence, the minimum amount of income to be in the top 2.5% is $74,600