What is 3 to the 7th power times 8 to the 5th power?

Look at this expression. a3b3c a-3b-3c-1 which of the following is the simplest form of the expression above?

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?

Are the corresponding angles congruent? explain why or why not.