Answer:
$45.22
Step-by-step explanation:
The number of miles per gallon can be represented by the ratio:
[tex]\frac{miles}{gallon}=\frac{26}{1}[/tex]
Since we know the unit rate of 26 miles per gallon of gas, we can set up a proportion, or equivalent ratios, to find the number of gallons needed for 420 miles:
[tex]\frac{26}{1}=\frac{420}{x}[/tex], where 'x' is the number of gallons of gas
cross-multiply and divide: 26x = 420 or x ≈ 16.15 gallons
If gas is $2.80 per gallon, take the total number of gallons needed and multiply by $2.80:
16.15 x $2.80 = $45.22
