Errata – 5 lb. Book of ACT Practice Problems, 1st Edition
Cover for 1st Edition
Release Date:
June 2, 2015
1.0
| Page | Loc | Description | Erroneous Text | Correction |
|---|---|---|---|---|
| 25 | Middle | Error in Section 2 time limit | … SET YOUR TIMER TO COUNT DOWN 9 MINUTES. | … SET YOUR TIMER TO COUNT DOWN 10 MINUTES. |
| 27 | Top | #6 question | for values of x such that –2 < x < 2. | for values of x such that –2 ≤ x ≤ 2. |
| 413 | Bottom | #58 answer choice labels | (Answer choices are incorrectly labeled (A), (B), (C), (D), and (E)) | (Label answer choices (F), (G), (H), (J), and (K)) |
| 525 | Top | #42 correct answer | 42. (K) –10 ≤ x ≤ 10 | 42. (K) √7 ≤ |x| ≤ 10 |
| 547 | Bottom | #42 correct answer | 42. (K) –10 ≤ x ≤ 10 | 42. (K) √7 ≤ |x| ≤ 10 |
| 548 | Top | #42 end of explanation | … That will be the case whenever –10 ≤ x ≤ 10. The correct answer is (K). | … That will be the case whenever –10 ≤ x ≤ 10. However, a final correction must be added: the original expression is undefined whenever the expression inside the radical is less than 0. In other words, x2 must be greater than or equal to 7. This condition is achieved when |x| is greater than or equal to √7. Adding this condition to the range –10 ≤ x ≤ 10 yields, in a compact form, √7 ≤ |x| ≤ 10. The correct answer is (K). |
| 635 | Bottom | #21 | If point Y is a point … | If point Z is a point … |
| 647 | Bottom | #79–81 are missing instructions | (missing text and diagram) |
Use the following information to answer questions 79–81. In the figure below, ABCD is a parallelogram with sides of length b and c and height a. The triangles ΔABF, ΔBCG, ΔCDH, and ΔADE are all equilateral triangles. The area of an equilateral triangle with sides that are each x units long is square units. 
|
| 651–652 | Bottom | #100–101 are missing instructions | (missing text and diagram) |
Use the following information to answer questions 100–101. In the figure below, ABCD is a square with a circle centered at E inscribed inside of it. A right triangle is inscribed inside of the circle; its hypotenuse forms a diameter of the circle of length c + d. The lengths of the legs of the right triangle are a and b, where 0 < b < a. The line segment connecting E and the right angle of the right triangle is of length e.  |
| 656 | Top | #115 diagram | (The label a is positioned just below the diameter WZ, indicating the wrong angle.) | (Position a just above the diameter WZ, indicating the angle next to b.) |
| 711 | Middle | #8 is missing instructions | (missing text and diagram) |
Use the following information to answer question 8. In the figure below, ABCD is a square with a circle centered at E inscribed inside of it. A right triangle is inscribed inside of the circle; its hypotenuse forms a diameter of the circle of length c + d. The lengths of the legs of the right triangle are a and b, where 0 < b < a. The line segment connecting E and the right angle of the right triangle is of length e. “ |
| 725 | Middle | #12 explanation | This problem asks you to find the period for this function. The period of a trigonometric function is the distance along the x-axis, in radians, that it takes for the graph to begin to repeat itself in shape and value. | This problem indirectly asks you to find the period for this function. The period of a trigonometric function is the distance along the x-axis, in radians, that it takes for the graph to begin to repeat itself in shape and value. In other words, the period is the width of the shortest repeating vertical “slice” of the function. |
| 725 | Middle | #12 explanation | … the function in one interval will identical to the function … | … the function in one interval is identical to the function … |
| 833 | Middle | #9 choice (B) | Face paint | Blue face paint |
| 858 | Bottom | #9 explanation | … face paint, choice (B). | … choice (B), blue face paint (although “red decorative face-paint” was mentioned). |
| 910 | Middle | #24 explanation misspelling | The other choices are unsupported by the text of the passsage. | The other choices are unsupported by the text of the passage. |
| 961 | Top | The correct answer for #46 is mislabeled. | 46 – G | 46 – H |
| 974 | Middle | The correct answer for #46 is mislabeled. | 46. (G) 35–39 | 46. (H) 35–39 |
| 974 | Middle | #46 explanation | The correct answer is (G). | The correct answer is (H). |
| 996 | Middle | #16 question | If the trends displayed in Table 3 continue … | If the trends displayed in Figure 1 continue … |
| 1123 | Top | #19 question | If the students performing Study 2 … | If the students performing Study 1 … |