- What happens if you try to take the square root of a negative number?
- What happens if you use java.lang.Math.pow to raise zero to the zeroth power?
- What, if anything, can come before a package statement in a Java source code file?
- What, if anything, can come before an import statement in a Java source code file?
- Can one source code file import from more than one package?

- Although mathematicians prefer to work in radians, most scientists and engineers find it easier to think in degrees. Write sine, cosine and tangent methods that accept their arguments in degrees.
- Write the corresponding set of inverse trigonometric methods that return their values in degrees instead of radians.
- The math library is missing secant, cosecant and cotangent methods. Write them.
- The math library lacks a log10 method for taking the common logarithm. Write one.
- Computer scientists often use a log2 (log base 2). java.lang.Math doesn't have one of those either. Write it.
- A simple model for the growth of bacteria with an unlimited supply of nutrients says that after t hours an initial population of p0 will have grown to p0e1.4t. Write a Java application that calculates the growth of a colony of bacteria. As usual get the value of p0 and t from the command line.
- Modify the bacteria growth program so that the time can be input in minutes. Note that the formula still requires a time in hours.
- Carbon dating is used to estimate the age of once living objects according to the following formula:
Write a Java application that calculates the age of an object given the percentage of carbon 14 remaining.

- Put the VeryLong and Rational classes of the Exercises in Chapter 7 into your own package.

Copyright 1996

elharo@sunsite.unc.edu

Last Modified August 20, 1996