In one day, a family in a car rode for 2 hours, stopped for 3 hours, and then rode for another 5 hours. during the day, the family traveled a total distance of 400 kilometers. what was their average speed for the whole trip

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?