If you graph a linear function, you get a line. If you graph a quadratic function, you get something called a parabola. A parabola tends to look like a smile or a frown, depending on the function. Check out this tutorial and learn about parabolas!
Orange Door Meanings. Orange is a colour associated with Mercury, which is the swiftest of the planets. Indeed the planet as the fleet-footed Roman god is symbolic of for reception, communication, perception, commerce, movement, intelligence and flexibility. With these kind of qualities, it might be a good idea to paint your business door orange.
The right shutter color adds visual interest to a stone house. When choosing exterior house colors remember that your home's exterior is the first thing visitors see, and as the home portal, your door is especially important to that first impression. Color is a great way to highlight a door so that it is the obvious entrance to the house.