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You sail a boat due north with a speed of vo 8 knots. TheTell-tale, which shows the direction of the wind relative to the boat, points due east. Your boat then turns and sails due east at the same speed. The tell-tale now points 53 degrees north of west. What is the wind speed (relative to earth)? [The units for your answer will be knots. Enter your answer to one decimal place.] 0o Tell-tale

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