## Functions Modeling Change: A Preparation for Calculus, 5th Edition

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First, simplify $\log 10^5$. Since $\log 10^a=a$, $\log 10^5=5$. Next, simplify $\log 1$. Since $10^0=1$, $\log 1=\log 10^0=0$. Thus, $$\frac{\log 1}{\log 10^5}=\frac{0}{5}=0$$