Which expression is equivalent to m/n-7

Hi, can anyone show me how to do this problem? 100 points for this. in advance

Choose the more precise measurement. 26.4 cm or 8.39 cm

At the beginning of year 1, carlos invests $600 at an annual compound interest rate of 4%. he makes no deposits to or withdrawals from the account. which explicit formula can be used to find the account's balance at the beginning of year 5? what is, the balance?