She was a Revolutionary soldier. She joined the Continental Army disguised as the soldier, Robert Shurtleff.
Answer:
This document is known as the <em>Declaration of Independence</em>.
Answer: B) So they can communicate their results without confusion
Explanation: There are other systems besides the metric system, though the metric is the most commonly used system. In the SI international system, all units are derived from each other, forming a unique international standard. That way, all scientists around the world, or at least most of them using the SI system, can communicate in a unique scientific "language" without confusion and misunderstanding.
