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A commuter airplane starts from an airport and takes the route shown in the figure below. The plane first flies to city A located 175 km away in a direction 30.0° north of east. Next, it flies for 150 km 20.0° west of north to city B. Finally, the plane flies 190 km due west, to city C.
Find the location of city C relative to the location of the starting point.
Find the angle in degrees west of north.
In 9.00 days the number of radioactive nuclei decreases to one-eight the number present initially
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