Ok this is impossible you speak spanish
        
             
        
        
        
Answer:
there arent
Step-by-step explanation:
Δ is negative
 
        
             
        
        
        
Answer:
Usted
Step-by-step explanation:
Your mother's boss is someone you are speaking to formally.
 
        
                    
             
        
        
        
Answer:  
Esta no es una pregunta, pero si la reformula, podría ayudar
Step-by-step explanation:
 
        
             
        
        
        
Answer: a. P (x<30) = 0.5276
               b. P (30<x<35) = 0.0555
Step-by-step explanation: An <u>exponential</u> <u>distribution</u> is a distribution of time in which events happens at a constant average rate.
The rate is calculated as 

with μ as the mean.
The probability density distribution for this type of distribution is

And probability is calculated as

For tuning of an engine, the rate is

λ = 0.025
a. Probability of less than 30 minutes:


P (X < 30) = 0.5276
<u>Probability of tuning in 30 minutes or less is </u><u>52.76%</u><u>.</u>
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b. Probability of between 30 and 35 can be described as



P (X < 35) = 0.5831
P (X < 30) = 0.5276
Then:

P (30 < X < 35) = 0.0555
<u>Probability of tuning an engine between 30 and 35 minutes is </u><u>5.55%.</u>
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