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A lifeguard spots a swimmer in the lake at an angle of depression of 45. He spots a sailboat, further out, at an angle of

A lifeguard spots a swimmer in the lake at an angle of depression of 45. He spots a sailboat, further out, at an angle of depression of 26. If the lifeguard is 36.5 dm away from the swimmer and 84.7 dm away from the sailboat, how far is the swimmer from the sailboat?

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