Six Sigma is a set of techniques and tools for process improvement. It was introduced by engineer Bill Smith while working at Motorola in 1986. Jack Welch made it central to his business strategy at General Electric in 1995. Today, it is used in many industrial sectors.
One acre equals 0.0015625 square miles, 4,840 square yards, 43,560 square feet or about 4,047 square metres (0.405 hectares) (see below). While all modern variants of the acre contain 4,840 square yards, there are alternative definitions of a yard, so the exact size of an acre depends on which yard it is based.
How many cubic feet are in an acre of land? 1 acre = 43560 square feet   Now, square feet are a unit of Area L x W   Cubic feet are a unit of Volume L x W x H (height)   Since an acre of land is just on the X Y â¦ axis/plane then it is simply 43,560 square feet.