Which number is three million times larger than 2.3 x 104 ? a) 2.3 x 10^7 b) 2.3 x 10^8 c) 6.9 x 10^9   d) 6.9 x 10^10

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?