Modeling with Exponential/Logarithmic Equations Practice Test

A town has an initial population of 18,000 and grows by $2.2%$ per year. Create an exponential model for the population after $t$ years, then determine the population after 15 years. Round to the nearest person and interpret your result in context.

The decibel level of a sound is given by $\text{dB}=10\log_{10}\left(\frac{I}{I_0}\right)$, where $I$ is the sound intensity and $I_0$ is a reference intensity. If a sound has intensity $2.5\times 10^4,I_0$, find its decibel level. Round to the nearest tenth and interpret your result in context.