Use implicit differentiation to find ∂z/∂x and ∂z/∂y.

yz = 5 ln(x + z)

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?