Cualcula el numero de lados de un poligono convexo, si la suma de sus lados interiores es 2.520°

What’s the answer ? use the picture to see the problem

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

What is the solution to the equation e3x=12? round your answer to the nearest hundredth