6 less than half of r : translate into expression

Which math sentence can be used to determine if the triangle is a right triangle?

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?

Match the one-to-one functions with the graphs of their inverse functions.