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Textbook An inverted pyramid is being filled with water at a constant rate of 55 cubic centimeters per second. The pyramid, at the top, has

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Textbook An inverted pyramid is being filled with water at a constant rate of 55 cubic centimeters per second. The pyramid, at the top, has the shape of a square with b1 b2 sides of length 5 cm, and the height is 9 cm. Find the rate at which the water level is rising when the water level is 4 cm. h cm/sec

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