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
1. anything 5 below
2. anything below 9
3.anything below 16
4. anything above 6
Answer:
1:>
2:>
3:>
Step-by-step explanation:
53 times .07 is 3.71
53 times .15 is 7.95
You add those and get $64.66.
Answer:
A)
B)
Step-by-step explanation:
A)
So we have the integral:
First, remove the constant multiple:
Use the power rule, where:
Therefore:
Simplify:
And multiply:
And, finally, plus C:
B)
We have the integral:
To solve, we can use u-substitute.
Let u equal 5-x. Then:
So:
Move the negative outside:
Power rule:
Add:
Substitute back 5-x:
Constant of integration:
And we're done!