Mr. Richards has two cars that he changes the oil in every four months.

During an oil change, each car needs 4 1/2 quarts of oil.
Each 5-quart container of oil costs $14.99.
Before tax, how much will the oil cost Mr. Richards for both cars in a year?
A
$44.97

B
$80.94

C
$89.94

D
$107.93
why is this c

every 4 months is 3 times a year

for 2 cars, 6 oil changes

6 * 4.5 = 27 qt of oil

(27 / 5) * 14.99 = ?

looks more like B

but if the oil has to be purchased in 5 qt increments
then 27/5 means 6 containers (answer C)
but (again) there is oil left over that can be used next year
so his AVERAGE yearly cost is B

the question is certainly ambiguous

To calculate the total cost of oil for Mr. Richards' two cars in a year, we need to determine how many oil changes he will perform in a year and then multiply that by the cost of each oil change.

Since he changes the oil in each car every four months, there are 12/4 = 3 oil changes for each car in a year.

For each oil change, each car needs 4 1/2 quarts of oil. So, for both cars combined, they need a total of 4 1/2 * 2 = 9 quarts of oil.

As each 5-quart container costs $14.99, Mr. Richards would need to buy 9/5 = 1.8 containers of oil for one oil change.

Multiplying this by the number of oil changes in a year, we get 1.8 * 3 = 5.4 containers of oil.

Therefore, the total cost of oil for Mr. Richards in a year would be 5.4 * 14.99 = $80.946, which is approximately $80.94.

So, the correct answer is option B: $80.94.

To find the answer to this question, we need to calculate the cost of oil for both cars in a year.

First, let's calculate how much oil is needed for each car in a year. Since oil is changed every four months, there are 12 months in a year, so we can divide 12 by 4 to find the number of oil changes in a year.

12 months / 4 months = 3 oil changes per year

Since each car needs 4 1/2 quarts of oil per oil change, we multiply the number of oil changes by the amount of oil needed:

3 oil changes * 4 1/2 quarts of oil = 13.5 quarts of oil per car per year

Now, let's calculate the cost of oil for one car in a year. Since each 5-quart container of oil costs $14.99, we can divide the total number of quarts needed by the amount of oil in each container:

13.5 quarts of oil / 5 quarts per container = 2.7 containers of oil

To find the total cost for one car in a year, we multiply the number of containers by the cost per container:

2.7 containers * $14.99 per container = $40.47

Since Mr. Richards has two cars, we need to double the cost:

$40.47 * 2 cars = $80.94

Therefore, the correct answer is B. $80.94.