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Question 4 15 / 15 A sailboat leaves a pier due east at 20 knots. After 2 hours, the sailboat changes course and sailed due

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Question 4 15 / 15 A sailboat leaves a pier due east at 20 knots. After 2 hours, the sailboat changes course and sailed due north at the same speed for 30 minutes. If the sailboat wants to head directly to the pier at this point, what course should it take

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