Need badly. if the area of bac=15, what is the area of edf

Find dy/dx using implicit differentiation ln(20+e^xy)=y

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?

Which will form a composite function?