An International Standard Book Number (ISBN) Is Used to Identify

question 3

Short Answer

An International Standard Book Number (ISBN) is used to identify books. The ISBN number for some book is . The first digit, 0, indicates the book is published in an English-speaking country. The next three digits, 534, identify the publisher (Brooks/Cole) and the next five digits identify the particular book. The last digit is a check digit, which is used as follows. Multiply the first digit by 10, the next digit by 9, and so on:
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This number is congruent to 0, (mod 11). This is not by chance. The check digit, 5, is chosen so that this sum is 0, (mod 11). In other words, the check digit x for the book with ISBN number is found by considering:
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This means that for check digit x, . The one-digit solution to this equation is , so the check digit is 6. What is the check digit for the book with ISBN ?
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x = __________

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Definitions:

Types of Goods

Classification of goods based on characteristics such as excludability, rivalry in consumption, and whether they are public, private, common, or club goods.

Negative Externalities

Costs suffered by a third party due to an economic activity, where those involved in the activity do not fully bear the cost.

Fighting Poverty

Fighting poverty involves implementing strategies and policies aimed at reducing or eliminating poverty, enhancing the quality of life for individuals and communities.

Public Good

A good that is non-excludable and non-rivalrous in consumption, meaning it can be used by everyone and one person's use does not reduce its availability to others.