Answer:
approximately $24.60
Explanation:
In order to find how much Lucas pays total, you would multiply the price per gallon ($2.09) by the gallons of gas (12.28), but this problem asks for an approximation, so you would just round both numbers to a reasonable number that is easier to multiply:
$2.09 --> $2
12.28 --> 12.3
$2 and 12.3 are relatively easy to multiply, and if you find their product, you will get $24.60, so he pays approximately $24.60 for gas.