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A disoriented physics professor drives 3.18 km north, then 4.72 km west, and then 1.61 km south. Find the magnitude of the resultant displacement

A disoriented physics professor drives 3.18 km north, then 4.72 km west, and then 1.61 km south. Find the magnitude of the resultant displacement of this professor. Express your answer in kilometers. [ Submit Part B Request Answer 0 = Find the direction of the resultant displacement of this professor. Express your answer in degrees. ? 4 km ? west of north

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