Suppose Tim timed the dog and found Elvis could run at 6.5 m/s on the sand and swim at 0.94 m/s. If Tim stood at point A and threw the ball to a point B in the water, which was a perpendicular distance 10 m from point C on the shore, where C is a distance 15 m from where he stood, at what distance x from point C did Elvis enter the water if the dog effectively minimized his time to reach the ball? (Round your answer to two decimal places.)

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