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Communications

7. Warming up on Permutations (Chapter 3.2)

This assignment must be submitted at least one hour before class meets.





Please select your section
Section # Time Room Instructor
C565 MW 9:30 A BS 3018 Hernandez
C566 MW 1:00 P BS 3018 Hernandez
C567 MW 2:30 P BS 2007 Patterson
C568 MW 5:45 P LE 105 Hicks
C569 MW 7:15 P LE 103 Omran
C570 TR 11:00 A BS 2007 Tompkins
C571, C575 TR 1:00 P LE 101 Watt
C572 TR 4:00 P BS 3006 Tompkins
C573 TR 5:45 P LE 105 Schilling
C574 MW 6:00 P CS Holmes


Please type your LAST, FIRST name:
Please type your Student ID number:
I received no help from anyone on this assignment.


The following question refers to the material you were to read in preparation to the lesson.

You may change your mind as often as you wish. When you are satisfied with your responses, click the SUBMIT button at the bottom of this page.



Think of something you use on a regular basis that requires a code to be entered. For example, the key pad on an automatic garage door opener (don't use this example, be creative and think of something else).

1. What is the object you are thinking of, and how does the code work (i.e., how many digits are in the code and the number of choices per digit)?

2. Does the code require the digits to be entered in a specific sequence or order?

3. How many possible codes exist for this object (of which only one would be the correct code)?

4. If a code-breaking device generates a new code every second (one code per second, this is a very slow device with today's technology), how long will it take in DAYS for the code breaker to try every possible code for the object you thought of?






Below is a space for your thoughts, including general comments about today's assignment (what seemed impossible, what reading didn't make sense, what we should spend class time on, what was "cool", etc.):




You may change your mind as often as you wish. When you are satisfied with your responses click the SUBMIT button.

I received no help from anyone on this assignment.




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