Given matrix A, find the indicated cofactor.Find A42.A =
A. 0
B. -30
C. 30
D. 15
Answer: C
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Use implicit differentiation to find the specified derivative at the given point.Find 
at the point (1, 2, e5) for ln(xz)y + 3y3 = 0.
A. 
B. - 
C. 
D. - 
Solve the problem.The Mathematics Department is holding an election for department chair. Each member ranks the candidates from first to third. The preference table below shows the results of the ballots with candidates Clark (C), Jones (J), and Smith (S). 
If the Borda count method is used to determine the winner, is the majority criterion satisfied?
A. Yes B. No
Solve the equation in the complex number system.x7 - 1 = 0
A. 1, cos(25.7°) + i sin(25.7°), cos(51.4°) + i sin(51.4°), cos(77.1°) + i sin(77.1°), cos(102.9°) + i sin(102.9°), cos(128.6°) + i sin(128.6°), cos(154.3°) + i sin(154.3°) B. 1, cos(51.4°) + i sin(51.4°), cos(102.9°) + i sin(102.9°), cos(154.3°) + i sin(154.3°), cos(205.7°) + i sin(205.7°), cos(257.1°) + i sin(257.1°), cos(308.6°) + i sin(308.6°) C. -1, cos(25.7°) + i sin(25.7°), cos(51.4°) + i sin(51.4°), cos(77.1°) + i sin(77.1°), cos(102.9°) + i sin(102.9°), cos(128.6°) + i sin(128.6°), cos(154.3°) + i sin(154.3°) D. 1, cos(51.4°) + i sin(51.4°), cos(102.9°) + i sin(102.9°), cos(154.3°) + i sin(154.3°), cos(205.7°) + i sin(205.7°), cos(257.1°) + i sin(257.1°), cos(308.6°) + i sin(308.6°), -1
For the given angle, name the quadrant in which the terminal side lies.-296°
A. I B. II C. III D. IV