Answer:
It is D Because I'm soo Smart And the Question is easy
(q ° r) = -32
(r ° q) = 101
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.