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!
Green Door Meanings. Green bursts with images of spring, and so green is symbolic of renewal, growth, rejuvenation and transformation. Green is associated with the earth, and can provide grounding energies. Green is also used in holistic healing practices because it promotes physical well-being as well as compassion.
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.