22 to the 7 power minus 22 to the 4 power

Which expression is equivalent to? assume x > 0 and y > 0.

Divide the following fractions 3/4 ÷ 2/3 1/2 8/9 9/8 2

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?