The number of days ahead travelers purchase their airline tickets can be modeled by an exponential distribution with the average
 amount of time equal to 15 days. What is the probability that a traveler will purchase a ticket fewer than ten days in advance?
       
      
                
     
    
    
    
    
    1 answer:
            
              
              
                
                
Answer:P(x<10) =0
Step-by-step explanation:
M =1/μ
M= 1/15 =0.066667
X- Exp (0.066667)
Where: X is the random variable for number of days
P (X<x) = 1 - e^-mx
P(X - x) = 1 - e^-0.06666 x10
P(x<10) = 0
 
                                
             
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Answer:
whats the question though?
 
        
             
        
        
        
3-y/2=1
-3 -3
-y/2=-2
x2 x2
-y=-4
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2. an=20+an−1 and a1=145
she starts with 145 so a1=145 and then adds 20 every month: an=20+an−1
        
                    
             
        
        
        
3,190,000 is  319 x 10^5 in scientific notation