Chapter 18
Practice Exam 3: Answers and Explanations
Read over each question from Chapter 17 as you check the answer key. I hope you did well on this practice exam. If you find you need to study more for any subtest, follow the crossreferences. (And for indepth study, check out some of the book recommendations in Chapter 14.)
Subtest 1: General Science Answers
If you’re still having problems figuring out the difference between an isotope and an ion, remember you may not have to do well on this subtest. It depends on the military career you’re interested in. (See the appendix for a list of military jobs that require a competent General Science score.) If this subtest is important to your military career aspirations, consider putting in some extra study. You can find additional information and practice questions in Chapter 8.
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Subtest 2: Arithmetic Reasoning Answers
You have to do well on this subtest to qualify for military enlistment — your score from the Arithmetic Reasoning subtest counts toward your AFQT score. If you’re still doing poorly on this test, you may want to postpone taking the ASVAB until you have more study time under your belt (and perhaps take a math class or two). You may also want to review Chapters 6 and 7.

D. Multiply $0.45 (the cost of making three donuts) by 4 to find the cost of making a dozen donuts: . Then subtract the cost of making one dozen donuts from the selling price of one dozen donuts ...
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