# math help

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?
A
\$44.97

B
\$80.94

C
\$89.94

D
\$107.93
why is this c

1. Scott

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

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