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.
Although painting your entire exterior would be a big to-do, giving just your door a new look is a doable DIY -- and it packs a lot of punch. We've chosen six paint colors for front doors that will give your house some major curb appeal. 1  1. Red: You can't go wrong with a classic fire engine shade, and this bold hue looks great with homes clad in white, blue and grey.