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| Teaching Since: | May 2017 |
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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
5.45Â Â Â Â Â At Oxnard University, a student ID consists of two letters (26 possibilities) followed by four dig- its (10 possibilities). (a) How many unique student IDs can be created? (b) Would one letter fol- lowed by three digits suffice for a university with 40,000 students? (c) Why is extra capacity in student IDs a good idea?
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5.46     Until 2005, the UPC bar code had 12 digits (0–9). The first six digits represent the manufacturer, the next five represent the product, and the last is a check digit. (a) How many different manufac- turers could be encoded? (b) How many different products could be encoded? (c) In 2005, the EAN bar code replaced the UPC bar code, adding a 13th digit. If this new digit is used for prod- uct identification, how many different products could now be encoded?
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