Answer : 0.0129
Step-by-step explanation:
Given : Based on FAA estimates the average age of the fleets of the 10 largest U.S. commercial passenger carriers is years and standard deviation is years.
Sample size :
Let X be the random variable that represents the age of fleets.
We assume that the ages of the fleets of the 10 largest U.S. commercial passenger carriers are normally distributed.
For z-score,
For x=14
By using the standard normal distribution table , the probability that the average age of these 40 airplanes is at least 14 years old will be :-
Hence, the required probability = 0.0129
Answer:
Sorry
Step-by-step explanation:
i dont know
felling sorry
Sorry in order to answer this I need the picture of the 4 triangles
Answer:
I'm not sure but the last one I think is wroght
2x^2=32 so divide by 2 to make x^2=16 and the square root so x=4