Which of the following numbers are in set A? Check all that apply.
A = {x | x is a positive, odd integer less than 7}
О-1
Оо
О 1
ООО

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?