Solve the problem.Find the impedance ZT when the impedances Z1 = -8 + 2j, Z2 = -8 - 2j and Z3 = 10j are in parallel.
A. ZT = -16 + 10j
B. ZT = 680j
C. ZT = - 
- 
j
D. ZT = - 
+ 
j
Answer: C
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Solve the problem.The areas of the faces of a rectangular box are 48 m2, 96 m2, and 288 m2. A second box is cubical and each of its faces has area 16 m2.Find the ratio of the volume of the first box to the volume of the second box.
A. 324 : 1 B. 16 : 1 C. 12 : 1 D. 18 : 1
Assume you have a digraph with 5 vertices (A, B, C, D, and E) and 9 arcs. A is incident from C, D, and E; B is incident to D and E and incident from C; D is incident to C and incident from E.Suppose that the vertices of the digraph represent individuals and there is an arc going from vertex X to vertex Y if and only if X "likes" Y. Which of the following statements [A), B), C), or D)] is not true?
A. A does not like B, C, D, or E. B. E likes A and D but does not like B or C. C. B likes E but E does not like B. D. A and B do not like each other. E. all of these statements are true.
Find the sum of the sequence.
A. 272 B. 400 C. 384 D. 53
Simplify the radical. Assume that all variables represent nonnegative real numbers. 
A. 4x2 
B. 4x
C. 4xy
D. 4xy2 