HELO PLEASE I NEED JT

If g(x) is an odd function, which function must be an even function?

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?

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?