Idon’t know answer for this one either i’m having trouble number 5

What are the domain and range of the function f(x)=2^x+1

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?

Proportions in triangles solve for x