The steam engine as it was to be used in many machines such as trains, steamboats, factories, farming equipments, etc.
213,000 can be rewritten as 2.13*10^5. This tells us that it has has 3 significant digits.
Your correct answer is b. It has three significant figures.
Depends. What war are you talking about? If it's WW1, then it's because everyone was stupid at the time and thought their enemies did it and one thing led to another.
Answer:
Pyramid of Menkaure
Pyramid of Menkaure. The third of the major pyramids at Giza belongs to Menkaure. This is the smallest of the three, rising to a height of 65 meters (213 feet), but the complex preserved some of the most stunning examples of sculpture to survive from all of Egyptian history.