Final answer:
To convert the price of gasoline from pounds per liter to dollars per gallon, multiply the price by the conversion factor and the exchange rate. The price of gasoline in US dollars per gallon in Cardiff is approximately $5.26.
Step-by-step explanation:
To convert the price of gasoline from pounds per liter to dollars per gallon, we need to consider the conversion factor between liters and gallons. There are roughly 3.79 liters in 1 gallon.
First, we convert the price of gasoline from pounds per liter to pounds per gallon by multiplying it by the conversion factor: .99 pounds per liter * 3.79 liters per gallon = 3.7541 pounds per gallon.
Next, we convert the price from pounds to US dollars by using the current exchange rate. Let's assume the exchange rate is 1 pound = 1.40 US dollars. So, 3.7541 pounds per gallon * 1.40 US dollars per pound = 5.25574 US dollars per gallon.
Therefore, the price of gasoline in US dollars per gallon in Cardiff is approximately $5.26.