Define an exponential expression
Exponential expressions are just a way to write powers in short form. The exponent indicates the number of times the base is used as a factor
For example the number 64 can be written as
Where 2 is the base and 6 is the exponent
Write out the expression given in the question and determine the parameters
From the question, 8 is the exponent and the base is 8
Hence, the base of the exponent 8 is c