In a circle with radius 7.4, an angle intercepts an are of length 36.6. Find the angle in radians to the nearest 10th

Find the area of the regular hexagon if a side is 20 cm.

If you could answer these your a life saver

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?