3.6 is 240% of what number?

What are the first 4 terms in the multiplication pattern given by the formula 2×4n

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?

700 miles the train takes 5 hours to a travel the distance at what unit rate is the train traveling?