Concept explainers
Decoding (S). A friend with lousy handwriting writes down a UPC. Unfortunately, you can’ tell his 4’s from his 9’s or his l’s from his is. If the code looks like 9 0 3 0 6 8 8 2 3 5 1 7, is there any way to deal with the ambiguity? If so, what is the actual UPC? If it is not possible to determine the correct UPC, explain why.
Want to see the full answer?
Check out a sample textbook solutionChapter 2 Solutions
The Heart of Mathematics: An Invitation to Effective Thinking
Additional Math Textbook Solutions
A Problem Solving Approach to Mathematics for Elementary School Teachers (12th Edition)
Calculus for Business, Economics, Life Sciences, and Social Sciences (13th Edition)
Excursions in Modern Mathematics (9th Edition)
Mathematical Ideas (13th Edition) - Standalone book
A Survey of Mathematics with Applications (10th Edition) - Standalone book
Fundamentals of Differential Equations and Boundary Value Problems
- Suppose that the check digit is computed as described in Example . Prove that transposition errors of adjacent digits will not be detected unless one of the digits is the check digit. Example Using Check Digits Many companies use check digits for security purposes or for error detection. For example, an the digit may be appended to a -bit identification number to obtain the -digit invoice number of the form where the th bit, , is the check digit, computed as . If congruence modulo is used, then the check digit for an identification number . Thus the complete correct invoice number would appear as . If the invoice number were used instead and checked, an error would be detected, since .arrow_forwardA commuter must travel from Ajax to Barrie and back every day. Four roads join the two cities. The commuter likes to vary the trip as much as posible, so she alwaysleaves and returns by different roads. In how many different ways can she make the round-trip?arrow_forwardAn Internet service provider requires its customers lo select a password consisting of four letter followed by three digits. Find how many such passwords are possible in each of the following cases: (a) Repetition of letters and digits is allowed. (b) Repetition of letters and digits is not allowed.arrow_forward
- License Plate Numbers In a certain state, each automobile license plate number consists of two letters followed by a four-digit number. To avoid confusion between “O” and “zero” and between “I” and “one,” the letters “O” and “I” are not used. How many distinct license plate numbers are possible in this state?arrow_forwardfor part (a) i don't understand how e2 can be used as the encryption key as the dimensions don't match either of the keys given as the message is a 2x4, while the keys are 2x2 and 3x3. they arent 2x4, so how could either of them be used?arrow_forwardTheoretically, what is the highest possible value for the slugging average? Could a player ever achieve this value during a baseball season? Give an example or explain why none exist. A. 1.000. 1 is perfect, so a player would have to reach base EVERY time...it is possible.B. 2.5000. If you add all of the bases up and find the average, this is the number. A player would have to hit each of the types of hits and that is possible.C. 4.000. It is possible for a player to achieve that number, but not probable...he would have to hit a Home Run EVERY at bat.D. .500. A player who hits .500 is considered to be a great player, and this has been achieved by only a select number of players.arrow_forward
- A commuter owns 2 cars, 1 compact and 1 standard model. About ¾ of the time he uses the compact to travel to work, and about ¼ of the time the larger car is used. When he uses the compact car, he usually gets home by 5:30 p.m. about 75% of the time; if he uses the standard-sized car, he gets home by 5:30 p.m. about 25% of the time (but he enjoys the air conditioner in the larger car). a) If he gets home at 5:35 p.m., what is the probability that he used the compact car? b) If he gets home at 5:30 p.m., what is the probability that he used the standard model?arrow_forward#9 I really need this fixed in excel if possible please. I'm not familiar with R coding yet.arrow_forwardFor example, for student ID s1243657, the 4th digital of s1243657 is “3”, therefore variable “A” is “Use interactive activities”; the 5th digital of s1243657 is “6”, therefore variable “B” is “Give a lot of assignments”; the 6th digital of s1243657 is “5”, therefore variable “C” is “Good communication skills. Student ID s12042516 as the case, the 4th digital is “4”, the 5th digital is 2, the 6th digital is 5. With the data collected, Dr Tian ran a test to see if there were significant relationships between A, B, C and satisfaction toward e-learning. I) Interpret the result and provide insightful remarks.arrow_forward
- Algebra: Structure And Method, Book 1AlgebraISBN:9780395977224Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. ColePublisher:McDougal LittellLinear Algebra: A Modern IntroductionAlgebraISBN:9781285463247Author:David PoolePublisher:Cengage LearningAlgebra and Trigonometry (MindTap Course List)AlgebraISBN:9781305071742Author:James Stewart, Lothar Redlin, Saleem WatsonPublisher:Cengage Learning
- College AlgebraAlgebraISBN:9781305115545Author:James Stewart, Lothar Redlin, Saleem WatsonPublisher:Cengage LearningAlgebra & Trigonometry with Analytic GeometryAlgebraISBN:9781133382119Author:SwokowskiPublisher:Cengage