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Answer:B) 8 hoursExplanation:To calculate how long it will take a plane to fly 4000 miles at a constant rate of 500 mph, you can use the formula:Distance (d) = Velocity (v) × Time (t)You are given the distance (d) as 4000 miles, and the velocity (v) is 500 mph. You need to find the time (t). Rearrange the formula to solve for time:Time (t) = Distance (d) / Velocity (v)Now, plug in the values:Time (t) = 4000 miles / 500 mph = 8 hoursSo, it will take the plane 8 hours to fly from Chicago to London at a constant rate of 500 mph.The correct answer is B) 8 hours....