An air traffic controller spots two planes at the same altitude converging on a point as they fly at right angles to each other. One plane is 150 miles from the point and is moving at 450 miles per hour. The other plane is 200 miles from the point and has a speed of 600 miles per hour. At what rate is the distance between the planes decreasing? Answer: -750 mph

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anonymous · Answer

@phi

phi · Answer

I would draw a picture and label it.

anonymous · Answer

like this? |dw:1355878388122:dw|