A group of backpackers after three days hiking are 35 mi, Ask an Expert

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A group of backpackers, after three days hiking, are 35 mi west of their starting position. On the first day they hiked 20.0 mi south. on the second day they hiked 40.0 mi in a direction 53 degree east of north. Find the magnitude and the direction of their displacement on the third day.

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