Welcome to your interview.
The question is on your right: Estimating Flights in the Air. Take a moment with it first.
Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes). Discussion and graded submissions share your five interviewer interactions, so spend them well.
How many commercial flights do you estimate are in the air over the United States at any given Tuesday at 2:00 PM?