Photorefractive keratectomy. Photorefractive keratectomy (PRK) and laser-assisted sub-epithelial keratectomy (or laser epithelial keratomileusis) (LASEK) are laser eye surgery procedures intended to correct a person's vision, reducing dependency on glasses or contact lenses.
One acre is 43,660 square feet so 10 acres is 435,600 square feet. The area of a square is L 2 where L is the length of a side, so if the shape really is a square . L 2 = 435,600 square feet. so. L = Sqrt(435,600) = 660 feet. Penny
How many acres per sq acre? There is no such thing as a square acre because an acre already is a square unit that is rectangular. So it's a bit of a paradox to try to square one when the dimensions arâ¦e already 66x660 feet (43,560 ft.) Scrooge McDuck once claimed to have three CUBIC acres of space in his money bin.