The actual answer is 154 but the closest estimate would be 150. Just multiply the number of gallons filled her gas tank (14) and how many time she filled it (11).
It is very important to understand that Maria has a tank that has a volume capacity of 14 gallons. When the problem says that she has filled the tank 11 times, it means that she has filled the tank and then emptied it for refilling again. She repeated the process 11 times.
So, for solving the problem, it is necessary to multiply the tank capacity by the times Maria refilled it.
The number 154 is not an option so you must choose the value that better approaches to 154, it is 150 because the difference is the lowest.
The discount is $1.19 unless you have to round up than it is $1.20. in order to solve this problem you would set up a proportion. So your proportion would be x over 7.99 = 15 over 100. Than you would cross multiply. 7.99*15=119.85. and 100*x=100x. than u divided both sides by a 100. than x= 1.19. which 1.19 is the discount.
