Answer
\[\underline{ 7.27\,\ US\ dollars\text{ per gallon }}\]
Work Step by Step
Price of \[1\text{ liter}\] of gasoline is \[1.42\text{ euro}\].
Convert \[\text{euro}\] to \[\text{US}\$\] as follows:
\[\begin{align}
& 1\text{ euro}=\ \text{1}\text{.35 US dollar} \\
& 1.42\text{ euro}=\left( 1.42 \right)\left( \text{1}\text{.35 US dollar} \right) \\
& =\,\ 1.92\,\text{US dollar}
\end{align}\]
Convert \[\text{liter}\] into \[\text{gallon}\] as follows:
\[\frac{1}{3.785}\text{ gallon}\] costs \[1.92\,\text{US dollar}\].
So,
\[\begin{align}
& \text{1 gallon}=\left( 1.92\,\text{US dollar} \right)\left( 3.785 \right) \\
& =7.27\text{ US dollar per gallon}
\end{align}\]
The price of \[1\text{ gallon}\] gasoline in U.S. dollars is \[7.27\,\underline{\text{US dollars per gallon }}\]..
