Alexandra has already written 22 pages, andshe expects to write 3 pages for every additionalhour spent writing. How many hours will Alexandra have to spend writing this week in order to have written a total of 31 pages?

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?