Mathematics, 16.04.2020 02:08 tydukes10

The equation says that the z-value of each point on the surface is the same as 9r, the distance from the point to the z-axis. Because θ doesn't appear, it can vary. So any horizontal trace in the plane z = k (k > 0) is a circle of radius r = Incorrect: Your answer is incorrect. . These traces suggest that the surface is a cone. This prediction can be confirmed by converting the equation into rectangular coordinates. Since r2 = x2 + y2 we have

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