Answers for all of these problems are given. Feedback Exercises are at the end of each unit of a chapter. The problems of a Feedback Exercise give you a method of evaluating your work each day. Answers for all of these problems are given. If you have any trouble with a Feedback Exercise you will find help in the unit just completed.
Every problem has an answer given for it.
Your learning successfully depends upon knowing, as you go along, whether you are right or wrong. You must accept the responsibility for determining the accuracy of your work. Looking at the answer is one way for you to meet that responsibility. Learning how to check an answer is another way to meet the same responsibility. Regardless of your method, you are expected to always know whether your work has been done correctly.