Question

While traveling in England, Sonia noticed that the price of gas was 1.4 pints per liter. She wondered how that compares to the price of gas in Atlanta, where she lives. On that day, the exchange rate was £1= $1.56. Set up and evaluate a conversion expression to find the equivalent price in dollars per gallon. Use the conversion factor 1L=0.26 gal.

Answer 1

The price in dollars per gallon is 8.4

Explanation:

The ratio is a comparison between two quantities that is made using a quotient. In other words, a ratio is a comparison between two or more quantities that can be expressed as a fraction. If the quantities to be compared are a and b, the ratio between them is written as:
`(a)/(b)`

You know that the price in England is 1.4 pounds per liter and the current exchange rate is 1 pound = 1.65 dollars. So, being the following reasons:

• 
  `(1.4 pounds)/(1 liter)`

• 
  `(1.56 dollars)/(1 pound)`

and being the conversion factor 1 L = 0.26 gal expressed as a ratio:

• 
  `(1 liter)/(0.26 gal)`

you can see that the expression to find the equivalent price in dollars per gallon is:

`(1.4 pounds)/(1 liter)*(1.56 dollars)/(1 pound)*(1 liter)/(0.26 gal)`

Taking into account that all unwanted units of measure are canceled and solving:

`(1.4 pounds)/(1 liter)*(1.56 dollars)/(1 pound)*(1 liter)/(0.26 gal)=(2.184 dollars)/(0.26gal)= 8.4 (dollars)/(gal)`

The price in dollars per gallon is 8.4