### Home > PC > Chapter 2 > Lesson 2.3.8 > Problem 2-174

2-174.

A log is an exponent. In this case, the exponent equals 2.

The 4 is the base.

16 is the answer to the exponential question.

4^{2} = 16

Use the same thinking process as (a) above.

This is called a 'common log'. The base is 10.