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An airliner passes over an airport at noon traveling 510 mi divided by hr due west....

An airliner passes over an airport at noon traveling 510 mi divided by hr due west. At 1 : 00 p.m.​, another airliner passes over the same airport at the same elevation traveling due north at 570 mi divided by hr. Assuming both airliners maintain their​ (equal) elevations, how fast is the distance between them changing at 2 : 30 p.m.​

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