Find the new amount given the original amount and the percent of change 9; 30% increase

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?

How many $20 bills do you need to have to make $280

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?