How do scientific advancements allow the historical community to create a time frame to when people began to populate the Americas?

Business and industries in the 1920's most closely followed the buying demands of a) the government b)farmers c)consumers d)manufactures

What project establish leonardo da vincis reputation as a creative and talented engineer

What is the significance of the battle of saratoga? a. the defeat at saratoga allowed the british to invade new england by land. b. after the defeat at saratoga france refuse to sign a treaty with the united states. c. the british won a decisive victory at saratoga. d. after the victory at saratoga france gave open support to the united states including arms money and ships.