Calculus

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A ladder is leaning against the wall of a house.The base of the ladder is pulled away from the wall at a rate of 2ft/sec (b) Consider the triangle formed by the side of the house ,theladder, and the ground. Find the rate at which the triangle is changing when the base of the ladder is 7 ft from the wall. (c) Find the rate at which the angle between the ladder and the wall of the house is changing when the base of the ladder is 7 ft from the wall

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