Multiply.(x - 3y)(-4x + 11y)
A. x2 + 23xy - 33y2
B. x2 + 23xy + 23y2
C. -4x2 + 23xy + 23y2
D. -4x2 + 23xy - 33y2
Answer: D
Mathematics
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Find the flux of the vector field F across the surface S in the indicated direction.F = 
k ; S is the upper hemisphere of x2 + y2 + z2 = 25; direction is outward
A. - 
?
B. 
?
C. 
D. - 
Mathematics
Divide.
A. 0.42 B. 4.2 C. 14.2 D. 1.42
Mathematics
Compute the area of the shaded region. 
A. 80 - ln 9
B. 41 - ln 
C. 40 - ln 
D. 40 - ln 9
Mathematics
Find the period P, amplitude A, and phase shift S, and graph at least two periods of the equation.y = 4 sin (3x + 60°)
A. P = 90°, A = 3, S = 15°
B. P = 90°, A = 3, S = -15°
C. P = 120°, A = 4, S = 20°
D. P = 90°, A = 3, S = 15°
E. P = 
, A = 4, S = -20°
Mathematics