You are playing a game where you win $5 if you draw a card that is 9 or lower. j, q, k, and a count as 10. how much should you bet to break even? $3.46 $3.08 $3.14 $3.64

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?