This document provides examples of how to use logarithms to solve various financial and exponential growth problems. It includes examples of calculating how long it takes an investment to double at a given interest rate, determining the number of years it takes for one investment to equal another growing at different rates, calculating the number of monthly payments needed to reach a future value with compound interest, modeling population and radioactive decay with exponential functions, and converting between earthquake magnitude and intensity scales on a logarithmic scale.