Answer:
It is an example of an observational study.
Step-by-step explanation:
 
        
             
        
        
        
Answer:
The probability that at lest one job will be missed in 57 second is =0.819134
 =0.819134
Step-by-step explanation:
Poisson distribution:
A discrete random variable X having the enumerable set {0,1,2,....} as the spectrum, is said to be Poisson distribution.
 for x=0,1,2...
  for x=0,1,2...
λ is the average per unit time
Given that, a job arrives at a web server with the probability 0.03.
Here λ=0.03, t=57 second.
The probability that at lest one job will be missed in 57 second is
=P(X≥1)
=1- P(X<1)
=1- P(X=0)


=0.819134
 
        
             
        
        
        
Answer:
The work done to  pump all of the kerosene from the tank to an outlet is  
  
Step-by-step explanation:
The work is defined by:
 (1)
 (1)    
The force here will be the product between the volume and the kerosene weighing, so we have :

This force will be in-lbs.
 Where R is the radius (3 feet)                     
Then using (1), we have:
 
   
Here 8-y is a distance at some point of the tank. Now, to get the work done from the base to the top of the tank we will need to take integral from 0 to 8 feet.
 
 


 
  


Therefore, the work done to  pump all of the kerosene from the tank to an outlet is  
  
I hope it helps you!  
 
        
             
        
        
        
Answer:
15
Step-by-step explanation:
 
        
             
        
        
        
I think it's 6.216 x 10^8 if this is about standard notation