Can anyone help me please

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

Dakota earned $7.50 in interest in account a and $18.75 in interest in account b after 15 months. if the simple interest rate is 4% for account a and 5% for account b, which account has the greater principal? explain. to make it a little easier, there is an image. good luck!

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25