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hendricks_intermediate_algebra_1e_ch1_3

Chapter 2 Test 143 120. Suppose the actual length of an object is 20.35 in. If the length is approximated to be 21 in., what is the absolute error? 121. Suppose a machine with an absolute error reading of 1.15 units reports the measurement of an object as 12.98 units. What are the possible values for the actual measurement of the object? 122. Suppose a machine with an absolute error reading of 8.25 units reports the measurement of an object as 3163.78 units. What is the actual measurement of the object? 123. A poll shows that Candidate A will receive 32% of the votes and Candidate B will receive 36% of the votes. If the poll has an absolute error of 4%, what are the possible values for how much of the vote each candidate will receive? 124. A poll shows that Candidate C will receive 58% of the votes and Candidate D will receive 32% of the votes. If the poll has an absolute error of 5%, what are the possible values for how much of the vote each candidate will receive? SECTION 2.7 Solve each absolute value inequality. Write the answer in interval notation. (See Objectives 1–3.) 125. u3x + 2u ≤ 16 126. u12 - 4xu ≥ 8 127. -uxu ≤-2 128. 14 - ux + 3u > 8 129. 10 - u5 - 2xu < 7 130. 3.2 + ux - 0.6u ≥ 5.4 131. -uxu > 7 132. u4 - xu > 0 133. u2x + 10u ≤ 0 134. u2 - 9xu < 0 135. u8 - 3xu ≥ 0 136. 4.6 - ux - 2.3u ≤ 9.6 137. ubu> -12 138. ubu ≥- 4 5 139. u5y - 9u - 2<-12 140. u3y - 2u - 1<-14 Use an absolute value inequality to solve each problem. (See Objective 4.) 141. A November 2009 Gallup Poll found that 38% of Americans rating healthcare coverage in this country as excellent or good. If the margin of error was 4%, what are the possible percentages of Americans rating healthcare coverage as excellent or good? (Source: www.gallup.com) 142. A June 2010 Gallup Poll found that approximately 54% of Americans said they were energized Americans who were well-rested and did not experience ailments such as physical pain, headache, cold or flu. If the margin of error was 3%, what are the possible percentages of Americans who were energized? 143. A truck overturn resulted in a hazardous chemical spill. Emergency management personnel advised that motorists should be restricted from being within a 12-mi radius of the spill. If the spill happened at mile marker 226 on Pennsylvania Turnpike 76, what are the safe locations on the turnpike for motorists? 144. A truck overturn on the Pennsylvania Turnpike resulted in a hazardous chemical spill. Emergency management personnel advised that motorists should be restricted from being within a 20-mi radius of the spill. If the spill happened at mile marker 74 on the turnpike, what are the safe locations on the turnpike for motorists? Use test points to solve each inequality. (See Objective 5.) 145. ux - 12u < 19 146. ux + 7u > 21 147. u1 - 10xu - 3 ≥ 18 148. u3 - 2xu + 5 ≥ 20 CHAPTER 2 TEST / LINEAR EQUATIONS AND INEQUALITIES IN ONE VARIABLE 1. The solution set for 10y + 9 = 19 is a. e 14 5 f b. 516 c. 506 d. e- 71 10 f 2. The solution set for 6x - 4 - 4x = 2x - 4 is a. 526 b. e 2 3 f c. d. 5xux is a real number6 3. The solution set for -y - 2(2y - 1) = 5(1 - y) is a. 5-26 b. c. 526 d. 5xux is a real number6 4. If 2x - 3y = 6 is solved for y, then y = a. - 3 2 x - 3 b. 3 2 x + 3 c. 2 3 x - 2 d. - 2 3 x + 2 5. The graph of 6 - 3x≤-3 is a. –2 –1 0 1 2 3 4 5 6 7 8 b. –2 –1 0 1 2 3 4 5 6 7 8


hendricks_intermediate_algebra_1e_ch1_3
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