Unit 2B - Exponential and Logarithmic Functions
        2.9 Logarithmic Expressions
        2.10 Inverses of Exponential Functions
        2.11 Logarithmic Functions
        2.12 Logarithmic Function Manipulation
        2.13 Exponential and Logarithmic Equations and Inequalities
        2.14 Logarithmic Function
        Unit 2B REVIEW