Answer:
<u>The correct answer is C. $ 39.89</u>
Step-by-step explanation:
1. Let's review the information given to us to answer the questions correctly:
Tank capacity = 21 gallons
Cost of gallon of gas when the car is returned with under half a tank = $ 7.50
Cost of gallon of gas when the car is returned with more than half a tank = $ 5.75
Gas in the tank of the rental car = 1,800 fluid ounces
2. How much should you charge the customer to fill the tank?
Let's recall that 1 gallon = 128 fluid ounces
Now, we will answer the question this way, converting the tank capacity from gallons to fluid ounces:
Capacity of the gas tank = 21 * 128 = 2,688 fluid ounces
Like 1,800 is above the 50% of the tank, we will charge $ 5.75 per gallon to fill up the tank
Now, we calculate the cost of gas per fluid ounce, this way:
Cost per fluid ounce = 5.75/128 = $ 0.04492
Finally, we calculate how many fluid ounces the customer has to pay this way:
We will charge the customer = (2,688 - 1,800) * 0.04492
We will charge the customer = $ 39.89
<u>The correct answer is C. $ 39.89</u>
