Which technological innovation was essential to stimulate the expansion of the gold-salt trade in west africa?

What was the significance of the battle of saratoga

When there are advances in technology, such as the personal computer, how might business productivity change? a) productivity is separate from technological advances so there is no impact. the new technology can replace outdated, less efficient, machinery. o) the businesses' products will no longer be demanded. d) manufactured items will be made elsewhere.

Which of the following are examples of limited resources on the part of consumers?