we know that
1 gal = 3.7854 liters
Convert 38 l of gasoline to gallon
by proportion
[tex]\frac{1}{3.7854} \frac{gal}{l}=\frac{x}{38}\frac{gal}{l}\\\\ 3.7854*x=38\\ \\ x=38/3.7854\\\\ x=10.04\ gal[/tex]
Find the cost
we know that
The gas costs $2.09 per gallon
so
Multiply $2.09 by the total of gallons
$2.09*10.04=$20.98
therefore
the answer is
$20.98
