214.5
11x22=242
11x5/2=17.5
242-17.5=214.5
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.
The formula of a distance between two points:

We have the points P(2, 2) ans Q(7, 4). Substitute:

<h3>Answer: PQ = 5.4</h3>
Answer:
A.
Step-by-step explanation: