Final answer:
To find out how many liters are needed to fill a 21 gallon gas tank, multiply 21 by 128 to get the total fluid ounces, and then divide by 33.8 to convert to liters, resulting in approximately 79.53 liters.
Step-by-step explanation:
The student has asked how many liters of gasoline are required to fill a 21 gallon gas tank, given that 1 gallon is equivalent to 128 fluid ounces and 1 liter is equivalent to 33.8 fluid ounces. First, we need to find out how many fluid ounces are in 21 gallons by multiplying the number of gallons by 128. Then, we convert those fluid ounces into liters by dividing by 33.8.
Step 1: Calculate the total number of fluid ounces in 21 gallons.
Step 2: Convert the fluid ounces to liters by dividing by the conversion factor of 33.8 fluid ounces per liter.
The calculation is as follows:
Step 1: 21 gallons × 128 fluid ounces/gallon = 2688 fluid ounces.
Step 2: 2688 fluid ounces ÷ 33.8 fluid ounces/liter = 79.53 liters.
Therefore, approximately 79.53 liters of gasoline are required to fill a 21 gallon gas tank.