Heyy could you help me out with this question I have been stuck in this question??

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

41/17 as a decimal rounded to the nearest hundredth

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?