What are three terms in this equation ? 4x-2y+3​

I’m on question 7 it says a covered water tank is in the shape of a cylinder the tank has a 28 inch diameter and a height of 66 inches to the nearest square inch what is the surface area of the water tank

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*

Rewrite 9 log, x2 in a form that does not use exponents. 9log, x = log, x