# Homework Hints 13-6

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

However, as you go through the book be sure you look at all the examples in the text. If you need hints for the Level 3 problems, check some sources for help on the internet (see the LINKS for that particular section. As a last resort, you can call the author at (707) 829-0606.

On the other hand, the problems designated “Problem Solving” generally require techniques that do not have textbook examples.

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
Look in the book to find a statement of each of these properties.
Problems 3-10
Use the binomial distribution theorem as shown in Example 1.
Problems 11-16
Use the binomial distribution theorem. See the discussion following the box for binomial experiments.
Problems 17-18
See Example 1b to see how to handle inequalities like these problems.
Problems 19-22
See Example 1.
Problems 23-26
Use the binomial distribution theorem where p is the probability of drawing a red pen and k is the number of people selecting that color.
Problems 33-37
Let p = 0.2 and let k represent the number of infected leaves, and then use the binomial probabilities.
Problem 38
You need to work Problems 33-37 to answer this question.
Problems 39-52
These applications use the binomial distribution theorem. Look at Examples 3 and 4 for some help on how to set up these problems.