Cups are sold 20 to a package and plates are sold 50 to a package. If you want to have the same number of each item for your family reunion, what is the least number of packages of
each you need to buy?

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?