Find the indicated probability.The following contingency table provides a joint frequency distribution for the popular votes cast in the 1984 presidential election by region and political party. Data are in thousands, rounded to the nearest thousand. Political Party
A person who voted in the 1984 presidential election is selected at random. Compute the probability that the person selected is not from the South given that they voted Democrat.
A. 0.287
B. 0.293
C. 0.707
D. 0.881
Answer: C
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Solve the problem.If f(x) = 2x + 9 and g(x) = -6x2 + 5x + 6, find g(f(9)).
A. 3 B. -21 C. -4233 D. -861
Suppose you have the following project digraph. (The numbers in parentheses represent hours.)
Using the decreasing-time algorithm to schedule this project with two processors results in a completion time of
A. 18 hours. B. 23 hours. C. 19 hours. D. 22 hours. E. none of these
Determine if the function f defined by the set of ordered pairs has an inverse. If so, find the inverse.{(3, -5), (5, -3), (9, 2), (-9, -2)}
A. {(-2, 9), (9, 5), (-5, 3), (2, -9)} B. No inverse C. {(-5, 3), (-3, 5), (2, 9), (-2, -9)} D. {(-2, 9), (-3, 5), (-5, 5), (2, -9)}
Factor the sum or difference of two cubes.7r3 - 448
A. 7(r + 4)(r2 - 4r + 16) B. 7(r - 4)(r2 + 4r + 16) C. 7(r - 4)(r2 - 4r + 16) D. 7(r - 28)(r2 + 28r + 112)