1. A depositor opens a new savings account with $12,000 at 8% compounded semiannuallysemiannually. At the beginning of year 4?, an additional ?$6000 is deposited. At the end of ffive ?years, what is the balance in the? account?
2. Equipment maintenance costs for manufacturing explosion-proof pressure switches are projected to be $125,000 in year one and increase by 2.5% each year through year five. What is the equivalent annual worth of the maintenance costs at an interest rate of 10% per year, compounded MONTHLY?
Please do not use excel and show formulas.