Evaluate Where F(x, Y, Z) = 2x I $\sigma$ Is That Portion of the Surface Z = 4 -

question 78

Essay

Evaluate where F(x, y, z) = 2x i + 2y j + 4z k and $\sigma$ is that portion of the surface z = 4 - x² - y² above the xy-plane oriented by upward unit normals.