Minerals, organic matter, water and air.
By mid point equation, x = 2, y = 0.5, the answer is 0.5
Raw material extraction
manufacturing
distribution
and retail <span />
In 60 years, from 1801 to 1862, the amount of cotton picked daily by an enslaved person increased 400 percent. The profits from cotton propelled the US into a position as one of the leading economies in the world, and made the South its most prosperous region.