Which of the following is equal to square root ^3 square root 2

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

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?

This is about circle theorems. someone asap : (