PLSSS HEL I WILLL GIVE YOU BRAINLIEST PLSSS HEL I WILLL GIVE YOU BRAINLIEST PLSSS HEL I WILLL GIVE YOU BRAINLIEST

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?

Prove that 16^4-2^13-4^5 is divisible by 11.

8litres of paint can cover 129.6 m². how much paint is required to paint an area of 243m²?