I need some help with number 27. The question is "verify if the given functions are inverses of each other"

12. the amount of money in a bank account decreased by 21.5% over the last year. if the amount of money at the beginning of the year is represented by ‘n', write 3 equivalent expressions to represent the amount of money in the bank account after the decrease?

Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?

The trigonometric ratios sine and secant are reciprocals of each other