Answer:
a. 8.66 minutes
Step-by-step explanation:
Since the flight times are uniformly distributed, the standard deviation can be calculated as follows:

Where '<em>b' </em>is the maximum flight time (150 minutes) and '<em>a' </em>is the minimum flight time (120 minutes):

The distribution's standard deviation is 8.66 minutes.
Answer:
The answer is 13.50x
Step-by-step explanation:
81 / 6=13.5 per week
Answer:
40
Step-by-step explanation:
it's 8+8+8+7+9 so it's gonna be 40
-8-5b+7+5b
add +5b to -5b to get 0.
-8+7 = -1
Answer is -1.