In three dimensions, the equation of a sphere is similar to that of a circle. The

Chapter 11, Problem 45

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In three dimensions, the equation of a sphere is similar to that of a circle. The equation of a sphere with center(h, j, k) and radius r is (x - h)2 + (y - j)2 + (z - k)2 = r 2 . a. Write the equation of a sphere with center (2, -4, 3)that contains the point (1, -2, -5) . b. AC and BC are tangents from the same exterior point.If AC = 15 m, what is BC? Explain.

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