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
Texas State Highway Spur 729 ramp was eventually obliterated, as originally proposed by TxDOT to AASHTO, though its footprint is still visible past the barricades and fencing. Texas State Highway Spur 729 Spur 729 is an approximately state highway spur in King County, Texas. , it was the highest numbered spur route in the Texas state highway system, until the completion of Spur 1966. Spur 729 has an eastern terminus at an at-grade intersection with US 83 near the buildings of the Guthrie Common School District. The short route travels to the west along 6th Street, ending at a barricaded dead end. Spur 729 was