# Math 1320 Mathematics in the Modern World Homework

## Dr. Duval

For the week of November 21-23, keep reading section 7.2.

For the week of November 28-30, read section 7.3.

### Homework assignments

discuss in class Mon. 29 Aug.; turn in Wed. 31 Aug.
1.4: 5, 9.

discuss in class Wed. 7 Sep.; turn in Fri. 9 Sep.
2.1: 4, 6, 12.

discuss in class Mon. 12 Sep.; turn in Wed. 14 Sep.
2.2: 8, 10.
2.3: 8.

discuss in class Mon. 19 Sep.; turn in Wed. 21 Sep.
2.3: 11.
2.4: 6, 11, 14.

discuss in class Mon. 26 Sep.; turn in Wed. 28 Sep.
2.6: 8, 11, 13.

discuss in class Mon. 3 Oct.; turn in Wed. 5 Oct.
2.7: 4, 9, 20.

discuss in class Wed. 12 Oct.; turn in Fri. 14 Oct.
3.1: 9, 19.
3.2: 6, 18.

discuss in class Mon. 17 Oct.; turn in Wed. 19 Oct.
4.1: 12.
4.2: 7, 9, 12.

discuss in class Mon. 24 Oct.; turn in Wed. 26 Oct.
3.3: 10, 11, 12.
4.3: 9.

discuss in class Mon. 31 Oct.; turn in Wed. 2 Nov.
4.5: 8, 12.
5.3: 7.

discuss in class Mon. 7 Nov.; turn in Wed. 9 Nov.
4.7: 6, 8.

discuss in class Mon. 14 Nov.; turn in Wed. 16 Nov.
4.7: 4, 5, 15.

discuss in class Mon. 21 Nov.; turn in Wed. 23 Nov.
7.2: 13, 14, 21.

### Writing assignments

2.1: 19.
Make your written explanation clear enough that a skeptical, non-mathematical friend would understand your point. As part of your explanation, offer ways to change the numbers in the problem that would change the answer, and ways to change the numbers in the problem that would not change the answer.
3.2: 20.
First discuss this problem in groups of 2-4 students. Then write your answer so as to convince some classmates who have the opposite answer from yours that you are right (and they are not!).
4.3: 12, 13.
Problem 12 is really just a warmup for problem 13, which is the main focus of this assignment. Try these problems first by yourself, gathering enough data to make a hypothesis about what happens in each case. Then check with one or two other students to see how your hypotheses compare, and try to combine them. Then test your hypothesis on several more examples.

Turn in enough examples to convince a skeptic that your hypothesis is correct. Write about the process by which you arrived at, and then tested, your hypothesis. This written description of your process should be detailed enough for someone else to recreate your thinking.

4.7 16.
Explain your answers to the first five rows in enough detail so that a classmate would understand and believe your answers. Note that different entries in this table require different level of detail. For the last row, make your best guess based on the previous rows (look for a pattern in each column), and explain your guess.