This is a trigonometry question. I'm not getting it out 'A man, lying down on top of a cliff35m high observes the angle of depression of a bouy to be 20 degrees. Calculate the distance of the bouy from the foot of the cliff, which may be assumed to be vertical.'

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it would take 7/10 of an hour too fill the pool.

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when rotating a figure 180 degrees, imagine that you are able to take the figure and turn it clockwise or counterclockwise around a center point. to rotate a figure 180 degrees, you will need to apply the rule (x, y) → (-x, -y). start by using a coordinate grid with coordinates for each vertex of the figure. the center point of the coordinate grid is located at (0, 0), which is what you will rotate the figure around. write down the original coordinates of the shape you are going to rotate. then, apply the rule. for example, coordinate (1, 2) becomes (-1, -2). another example would be, coordinate (-4, -2) becoming (4, 2). after you change each original coordinate to the rotated coordinate, you will draw your new figure.

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answer: entity is prob the answer

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