The notation an for n > 0, means a multiplied by itself n times.

For example,
For a quantity an, a is called the base and n is called the exponent or index.

Example:
Find the value of each of the following:

Solution:
Any number with an exponent of 0 is 1.
Example:
Simplify the following:
a) 30Solution:
a) 30 = 1The following video shows some examples of positive exponents and zero exponent:
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