What expression is equivalent to 8(5n)

Write each expression in exponential form and find its value. 2 x 2 x 2 x 2

Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan bought 4 bottles of water and 1 cup of coffee for his family for 7.15. how much does each bottle of water cost? how much does each cup of coffee cost?

How do i do this activity, is appreciated