Concept explainers
UPC your friends. Have a friend find a product that has a 12-digit UPC. Ask your friend to carefully read aloud the digits but to skip one digit and say “blank” in its place. Figure out the missing digit. Do this with several different products if you wish. Explain to your friend how you did it. Record the UPCs, the missing digit, and your friend’s reactions.
![Check Mark](/static/check-mark.png)
Want to see the full answer?
Check out a sample textbook solution![Blurred answer](/static/blurred-answer.jpg)
Chapter 2 Solutions
The Heart of Mathematics: An Invitation to Effective Thinking, WileyPLUS NextGen Card with Loose-leaf Set Single Semester: An Invitation to Effective Thinking (Key Curriculum Press)
Additional Math Textbook Solutions
Mathematics with Applications In the Management, Natural, and Social Sciences (12th Edition)
Excursions in Modern Mathematics (9th Edition)
Fundamentals of Differential Equations and Boundary Value Problems
Probability and Statistics for Engineers and Scientists
Thinking Mathematically (7th Edition)
A Survey of Mathematics with Applications (10th Edition) - Standalone book
- Algebra: Structure And Method, Book 1AlgebraISBN:9780395977224Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. ColePublisher:McDougal LittellHolt Mcdougal Larson Pre-algebra: Student Edition...AlgebraISBN:9780547587776Author:HOLT MCDOUGALPublisher:HOLT MCDOUGALMathematics For Machine TechnologyAdvanced MathISBN:9781337798310Author:Peterson, John.Publisher:Cengage Learning,
- Elementary AlgebraAlgebraISBN:9780998625713Author:Lynn Marecek, MaryAnne Anthony-SmithPublisher:OpenStax - Rice University
![Text book image](https://www.bartleby.com/isbn_cover_images/9780395977224/9780395977224_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9780547587776/9780547587776_smallCoverImage.jpg)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781337798310/9781337798310_smallCoverImage.jpg)
![Text book image](https://www.bartleby.com/isbn_cover_images/9780998625713/9780998625713_smallCoverImage.jpg)