Evaluate Where F(x, Y, Z) = 9y I - $\sigma$

question 91

Multiple Choice

Evaluate where F(x, y, z) = 9y i - 9x j - 36z² k and $\sigma$ is that portion of the cone which lies above the square in the xy-plane with vertices (0, 0) , (1, 0) , (1, 1) , and (0, 1) , and oriented by downward unit normals.

• A) 72
• B) 18
• C) 0
• D) 24
• E) 45

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