I need help to answer this difficult question

Abcd is a square. what is the measure of angle bac

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?

Use the distance formula to find the distance between (-3,5) and (3,1)