Answer: a) 4.6798, and b) 19.8%.
Step-by-step explanation:
Since we have given that 
P(n) = 
As we know the poisson process, we get that

So, for exactly one car would be 
P(n=1) is given by

Hence, our required probability is 0.2599.
a. Approximate the number of these intervals in which exactly one car arrives
Number of these intervals in which exactly one car arrives is given by

We will find the traffic flow q such that 

 b. Estimate the percentage of time headways that will be 14 seconds or greater.
so, it becomes,

Hence, a) 4.6798, and b) 19.8%.
 
        
             
        
        
        
Step-by-step explanation:
a) $350 per week
20% commission on sales
For $925 in sales, commission is
20/100 × 925 = $185
Total earning = $350 + $185 = $535
b) For $x in sales, commission is
20/100 × x = 1/5 × x = x/5 or 0.2x
Total earnings = $350 + $ x/5 or $350 + $0.2x
 
        
             
        
        
        
Answer:
n=6
Step-by-step explanation:
(n-18)/3 = -4
multiply by 3
n-18 = -12
add 18
n = 6
 
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
 
        
                    
             
        
        
        
The rise is 1 and the run is 7