Powers
What Is a Power?
A power is the product of multiplying a number (or other quantity) by itself.
For example, 3^{2} is a power of 3.
3^{2} means that 3 will be multiplied by itself 2 times:
Dictionary Definition
The Oxford English Dictionary defines a power as "a quantity obtained by multiplying a given quantity by itself one or more times, the number of times the given quantity appears as a factor of the resulting product being indicated as the exponent of that quantity."
The Parts of a Power
A power consists of a base and an exponent:

3 is called the base. It is the number that is multiplying itself.

2 is called the exponent. It tells you how many times the base is multiplying itself.
Real Examples of Powers
Some real examples of powers are given below. (Don't forget: the base is multiplied by itself as many times as indicated by the exponent).
Powers can contain letters (or symbols) as well as numbers.

The base can be a letter instead of a number:

The exponent can be a letter:

Both the base and the exponent can be letters: