[tex]\bf \textit{there are 5280ft in 1 mile, so}\quad
\begin{array}{ccllll}
feet&miles\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
5280&1\\
29,035&m
\end{array}\implies \cfrac{5280}{29035}=\cfrac{1}{m}
\\\\\\
m=\cfrac{29035}{5280}\implies m\approx 5.499\\\\
-------------------------------\\\\[/tex]
[tex]\bf \textit{there are 1.609 kms in 1 mile, so}\quad
\begin{array}{ccllll}
miles&kms\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
1&1.609\\
5.499&k
\end{array}
\\\\\\
\cfrac{1}{5.499}=\cfrac{1.609}{k}\implies k=\cfrac{5.499\cdot 1.609}{1}[/tex]
