Express the complex number in trigonometric form. -2i

Ineed me i stuck and i don’t want to get it wrong

What is r i 4.5+10r=-6.5 with work pls

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?