An eighteen ounce box of cereal costs five dollars and forty cents. How much would you expect to pay if you bought the twenty-four ounce box?

two dollars and seventy cents

three dollars and sixty cents

four dollars and eighty cents

seven dollars and twenty cents

Question

An eighteen ounce box of cereal costs five dollars and forty cents. How much would you expect to pay if you bought the twenty-four ounce box?

two dollars and seventy cents

three dollars and sixty cents

four dollars and eighty cents

seven dollars and twenty cents

whpalmer4 · Answer

If 18 ounces cost $5.40, that's $5.40/18 oz = $0.30/oz.  How much is $0.30/oz * 24 oz?

anonymous · Answer

wat

anonymous · Answer

seven dollars and twenty cents  ?

whpalmer4 · Answer

Bingo!

anonymous · Answer

Thanks

whpalmer4 · Answer

If you go the grocery store and look closely at the shelf labels, you'll see that most things have a label with the "unit price", which is what we found by dividing the price of the 18 oz box by the number of ounces in the 18 oz box (18).  That allows you to make intelligent comparisons about which size container to buy, although this is often subverted by giving different units for the unit prices.  One might be $0.30 / oz, and another is $0.05 / gram.  They obey the law requiring them to post the unit prices, but many customers won't be able to make effective comparisons...