One side of a triangle is increasing at a rate of 4 cm/s and a second side is decreasing at a rate of 2 cm/s. If the area of the triangle remains constant, at what rate does the angle between the sides change when the first side is 23 cm long, the second side is 35 cm, and the angle is π/6? (Round your answer to three decimal places.) rad/s

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Step-by-step :

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(a) the volume of the cone is 20/3 in3

hence, option a is correct.

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.