$30,000 is deposited in an account in which it earns 10% interest compounded annually. No principal or interest is withdrawn from the account. Instead, both continue to earn interest over time. Find...

$30,000 is deposited in an account in which it earns 10% interest compounded annually. No principal or interest is withdrawn from the account. Instead, both continue to earn interest over time. Find the account balance after four years using the compound interest formula