Identify whether the given equation is quadratic or not quadratic

tabang nars

With finding limits of multi variable !

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

2. explain in words how you plot the point (4, −2) in a rectangular coordinate system.