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.
Painting Front Entry Door - How & What about Drying Time? I want to have my front door painted (or possibly do it myself if it's not too difficult a project). It's a fiberglass door w/6 panels, no windows. Everything I've read so far talks about the importance of letting the door dry/cure completely for using it/closing it, which can take up to a week.