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:
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:
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
?
x = __________
Correct Answer:
Verified
Q13: Perform the operation Q14: Perform the operation Q15: Perform the indicated operations. Q16: Solve the equation for x. Q17: Suppose you make six round trips to Unlock this Answer For Free Now! View this answer and more for free by performing one of the following actions Scan the QR code to install the App and get 2 free unlocks Unlock quizzes for free by uploading documents