Assume you have a digraph with 5 vertices (A, B, C, D, and E) and 9 arcs. B is incident from D, E, and A; C is incident to E and A and incident from D; E is incident to D and incident from A.How many cycles are there in the digraph that start and end at C?
A. 2
B. 0
C. 1
D. 3
E. none of these
Answer: A
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Use the five-step strategy for solving word problems to find the number or numbers described in the following exercise.When four times a number is added to 8 times the number, the result is 60. What is the number?
A. 0.6 B. -7.5 C. 7.5 D. 5
Solve the problem.Determine the actual and relative error.MEASUREMENTTRUE VALUEERRORRELATIVE ERROR(as a percent)5.3 pounds5.0 pounds??
A. 0.3 pounds; 0.06% B. 0.3 pounds; 60% C. 0.3 pounds; 6% D. 0.3 pounds; 0.6%
Find z1z2. Write the answer in polar form with the argument between 0° and 360°.z1 = 10(cos 30° + i sin 30°), z2 = 5(cos 10° + i sin 10°)
A. 50(cos 300° + i sin 300°) B. 15(cos 300° + i sin 300°) C. 50(cos 40° + i sin 40°) D. 15(cos 40° + i sin 40°)
Use polar coordinates to find the limit of the function as (x, y) approaches (0, 0).f(x, y) = 
A. 1 B. 0 C. 2 D. No limit