I would say 30,000 cause all the next developments were from the 1860's forward and that is when huge growth happened, after 1860.
Answer:
You can clearly see the spring that makes the pointer rise or fall as the pressure changes. ... A spring is cunningly attached to the box and, as the box moves in and out in response to the changes in air pressure, the spring expands or contracts and moves the pointer on the dial.......i'm going to say C
<span>Because Kansas had yet to be decided if they were to become a free state or a slave state. Both Pro and Anti Slavery fought for control of its territory.
Hope this helps :) </span>
Your answer is C: <span>They developed a time system based on 60 minutes.</span>
B is the correct answer
Sorry if I’m wrong
