Find the gradient field F of the function f.f(x, y, z) = z sin (x + y + z)
A. F = -cos xi - cos yj + (sin z - z cos z)k
B. F = z cos(x + y + z)i + z cos(x + y +z)j + (sin(x + y + z) + zcos(x + y + z))k
C. F = -z cos(x + y + z)i - z cos(x + y +z)j + (sin(x + y + z) - zcos(x + y + z))k
D. F = cos xi + cos yj + (sin z + z cos z)k
Answer: B
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Solve the problem.If the area of the seed triangle in the construction of the Sierpinski gasket is 5, then the area of the Sierpinski gasket is
A. 8. B. 10. C. 0. D. infinite. E. none of these
Find the magnitude and direction angle (to the nearest tenth) for each vector. Give the measure of the direction angle as an angle in [0,360°].
A. 
; 345°
B. 15; 105°
C. 15; 345°
D. 
; 285°
Multiply.
A. 623,960 B. 624,960 C. 634,960 D. 625,060