Considering that both Chicago and Memphis are in the same time zone, the flight took one hour and 40 minutes.
It Chicago at 9:50 AM Central Time and arrived in Memphis at 11:30 AM Central Time. Since they are in the same time zone, we don't have to do anything but subtract, then:
11:30 - 9:50
30 < 50, hence we remove one hour from Memphis and add 60 minutes, thus:
10:90 - 9:50 = 1:40
The flight took one hour and 40 minutes.
More can be learned about operations with hours at https://brainly.com/question/25169144