Answer:
increasing and linear
Step-by-step explanation:
Answer:
AEG - BEA = BEG => 81-27=54
Step-by-step explanation:
Answer:
Can you scroll up a little bit ill edit my answer once you do
Step-by-step explanation:
Answer:
the answer is 8
Step-by-step explanation:
add all four in n the half of the others 2 =1
Answer:
The mean of the total repair time is 150 minutes.
The variance of the total repair time is 725 minutes^2.
Step-by-step explanation:
To solve this problem, we have to use the properties of the mean and the variance. Our random variable is the sum of 3 normal variables.
In the case, for the mean, we have that the mean of the sum of 3 normal variables is equal to the sum of the mean of the 3 variables:

For the variance, we apply the property for the sum of independent variables (the correlation between the variables is 0):
