What are the different types of light

Nine more than four times a number is the same as one less than twice the number. find the number?

What is the range? can’t seem to find it out

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?