# Homework Hints 4-4

### Note: Homework Hints are given only for the levels 1 and 2 problems.

There are many sources for homework help on the internet.

Algebra.help
Here is a site where technology meets mathematics. You can search a particular topic or choose lessons, calculators, worksheets for extra practice or other resources.
http://www.algebrahelp.com/

Dr. Math is a registered trademark. This is an excellent site at which you can search to see if your question has been previously asked, or you can send your question directly to Dr. Math to receive an answer.
http://mathforum.org/dr.math/

Quick Math
This site provides online graphing calculators. This is especially useful if you do not have your own calculator.
http://www.quickmath.com/

The Math Forum @ Drexel
This site provides an internet mathematics library that can help if you need extra help. For additional homework help at this site, click one of the links in the right-hand column.
http://mathforum.org/

Problems 1-2
IN YOUR OWN WORDS problems remind you of what you did in the previous section.
Problems 3-6
Light “on” represents a “1” and light “off” represents a “0.” See Figure 4.3.
Problems 7-18
See Examples 1 and 2. Write each given number in exponential notation.
Problems 19-30
See Example 3. Use repeated division and keep track of the remainders.
Problems 31-34
See Table 4.9. The letter “D” follows the capital C (which has ASCII code 67), so “D” is 68. Repeat for each letter.
Problems 35-38
See Table 4.9. The number “70” is “F,” so “71” is “G,” and “72” is “H.”
Problems 39-45
Read the directions to these problems carefully, and then use the addition and multiplication tables to work out an answer, as shown in Example 3.