Solve the Problem $z = 9 - x ^ { 2 } - y ^ { 2 }$

question 187

Multiple Choice

Solve the problem.
-Find the average height of the part of the paraboloid $z = 9 - x ^ { 2 } - y ^ { 2 }$ that lies above the $x y$ -plane.

• A) 3
• B) \(\frac { 9 } { 2 }\)
• C) \(\frac { 27 } { 2 }\)
• D) \(\frac { 45 } { 2 }\)

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