Final answer:
To calculate the cost per gallon of gasoline, divide the total cost by the number of gallons. After dividing $41.21 by 15.1 gallons and rounding to the nearest hundredth, we get $2.73 per gallon.
Step-by-step explanation:
To find the cost per gallon of gasoline, we need to divide the total amount paid by the number of gallons purchased. Lisa paid $41.21 for 15.1 gallons. We use the following formula: cost per gallon = total cost / number of gallons.
Cost per gallon = $41.21 / 15.1 gallons = approximately $2.7285
When we round the result to the nearest hundredth (two decimal places), we get $2.73. Therefore, the correct answer is:
a) $2.73