Find the product of the complex number and its conjugate.6 - 3i
A. 27
B. 36 + 9i
C. 45
D. 36 - 9i
Answer: C
Mathematics
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Calculate the flux of the field F across the closed plane curve C.F = y2i + x3j; the curve C is the closed counterclockwise path formed from the semicircle 
0 ? t ? ?, and the straight line segment from (-4, 0) to (4, 0)
A. - 32 B. 32 C. 0 D. 64
Mathematics
Find the value of the indicated trigonometric function of the angle ? in the figure. Give an exact answer with a rational denominator.
Find cos ?.
A. cos ? = 
B. cos ? = 
C. cos ? = 
D. cos ? = 
Mathematics
Subtract and simplify. Write the answer as a mixed number as needed.15
- 6
A. 8
B. 9
C. 8
D. 7
Mathematics
Find the slope of the line that passes through the given points.(4, 8) and (1, 4)
A. 
B. 
C. 
D. - 
Mathematics