Cube root this required the construction, now known to be impossible, of the length . A method for extracting cube roots appears in "The Nine Chapters on the Mathematical Art", a Chinese mathematical text compiled around the 2nd century BCE and commented on by Liu Hui in the 3rd century CE. The Greek mathematician Hero of Alexandria devised a method for calculating cube roots in the 1st century CE. His formula is again mentioned by Eutokios in a commentary on Archimedes. In 499 CE Aryabhata, a mathematician-astronomer from the classical age of Indian mathematics and Indian astronomy, gave a method for finding
USS Apache (SP-729) June 1917. She was commissioned as USS "Apache" (SP-729) at Boston on 7 July 1917. "Apache" served as a dispatch boat and local patrol boat at Boston, operating under the aegis of the 1st Naval District, through early October 1918, by which time her name had been changed to USS "SP-729". Due to an urgent need for craft such as "SP-729" at Brest, France, an order dated 14 October 1918 went out from Washington, D.C., to Boston, directing the Commandant of the 1st Naval District to ready six section patrol boats -- USS "Commodore" (SP-1425), USS "Cossack" (SP-695), USS "War