posted by jhon
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?
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