Question

Our car has a 15-gallon gas tank. A lower grade of gasoline costs $2.96 per gallon. The premium grade gasoline costs $3.15 per gallon. There are three gallons left in your gas tank. What is the difference in the cost of filling your tank between the two grades of gasoline?

Answer 1

Answer:

The difference in the cost of filling your tank between the two grades of gasoline is $2.28.

Step-by-step explanation:

Given : Our car has a 15-gallon gas tank. A lower grade of gasoline costs $2.96 per gallon. The premium grade gasoline costs $3.15 per gallon. There are three gallons left in your gas tank.

To find : What is the difference in the cost of filling your tank between the two grades of gasoline?

Solution :

The gas tank is of 15 gallons

There are three gallons left in the gas tank.

The tank has to be filled with 15 - 3 = 12 gallons

A lower grade of gasoline costs $2.96 per gallon.

So, the cost of filling the tank with the lower grade gasoline is

$C_1=12\times 2.96$

$C_1=\ 35.52$

A upper grade of gasoline costs $3.15 per gallon.

So, the cost of filling the tank with the lower grade gasoline is

$C_2=12\times 3.15$

$C_2=\ 37.8$

The difference in the cost of filling your tank between the two grades is

$C= 37.80 - 35.52$

$C= 2.28$

Therefore, the difference in the cost of filling your tank between the two grades of gasoline is $2.28.