Homework 2 is due on Monday, May 31st.

1. Read Chapter 4. Indicating in at most three sentences one or more of the following: the passage in the reading— including its page number—you:

- Found most difficult
- Found most surprising
- Would like to have discussed in the next lectur

2. To successfully complete a B.S. degree in CISE, students must satisfy the following requirements:

- Complete at least 5 of 10 core courses.
- Complete at least 72 credit hours.

Know that each course worths 3 credit hours and there are 20 optional coures. A student plans to complete the degree with minimum number of credit hours. How many choice does he have, no matter the order of selected courses.

3. Seven darts are thrown onto a circular dartboard of radius 10 units. Can we show that there will always be two darts which are at most 10 units apart?

4. Lattice paths are paths in the plane from (0, 0) to (x, y) (x, y are integers) where at each step you must move either one unit up or one unit right. Count the number of lattice paths from (0, 0) to (x, y).

5. How many 9-digit numbers are there if each has exactly one 5 digit and a 4 digit?

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Sean Goldberg, on May 30, 2010 at 11:32 am said:I’m assuming that since Monday is Memorial Day, the homework is due on Tuesday, right?

cot3100su10, on May 30, 2010 at 9:05 pm said:Yes, its due is tomorrow.

Ollie Thomas, on May 31, 2010 at 5:32 pm said:If only more than 45 people would read this.

Sean Goldberg, on May 31, 2010 at 6:24 pm said:I’m confused? You said yes in agreement with me, then gave a contradictory statement saying it was due today (‘tomorrow’ when you wrote it). We didn’t have class today since the University was closed, so I’m forced to believe we can all turn it in on Tuesday?

cot3100su10, on May 31, 2010 at 9:04 pm said:Yes, I thought that I posted the reply on Monday. It’s a mistake. To make sure, I posted a new announcement. Thanks!

Sean Goldberg, on May 31, 2010 at 9:07 pm said:Thanks for the speedy reply!

cot3100su10, on May 31, 2010 at 11:20 pm said:You are welcome.