Find the Center and Radius of the Sphere $x ^ { 2 } + y ^ { 2 } + z ^ { 2 } - 12 z = 0$

question 94

Multiple Choice

Find the center and radius of the sphere. $x ^ { 2 } + y ^ { 2 } + z ^ { 2 } - 12 z = 0$

• A)center: (0,0,6);radius: 6
• B)center: (0,0,6);radius: 36
• C)center: (0,0,-6);radius: 6
• D)center: (0,0,0);radius: 0
• E)center: (0,0,0);radius: 36

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