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 voted Democrat.
A. 0.098
B. 0.406
C. 0.442
D. 0.241
Answer: B
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Solve the problem.An uncovered box is to be made from a rectangular piece of tin by cutting 2-in. squares out of the corners and folding up the sides. The volume of the box will be 100 in.3. Find the dimensions of the rectangular piece of tin. Round to the nearest tenth, if necessary.
A. 4 in. by 9 in. B. Cannot be determined without additional information C. 5 in. by 9 in. D. 5 in. by 10 in.
Solve the problem.Photography reprints cost $0.52 each at a local photo shop, or $0.44 each, plus $1.15 postage and handling, through the mail. How many reprints must a customer purchase to make it less expensive to use mail order?
A. none of these B. More than 19 reprints C. More than 20 reprints D. More than 14 reprints
Convert the inequality into a linear equation by adding a slack variable.8x1 + x2 + 2x3 ? 239
A. 8x1 + x2 + 2x3 + s1 ? 239 B. 8x1 + x2 + 2x3 + s1 + 239 = 0 C. 8x1 + x2 + 2x3 + s1 = 239 D. 8x1 + x2 + 2x3 + s1 ? 239
Factor completely.x6 - 2x5 - 63x4
A. x4(x - 9)(x - 7) B. x4(x - 9)(x + 7) C. x4(x + 9)(x + 7) D. x-9(x2 - 2x - 63)