Gun powder was used for military purposes in the 919 A.D. It killed many people in China. It was explosive.
Answer:
B. the mining and meat packing industries developed
Explanation:
With the expanding of the railroad lot of industries flourished, including the mining and the meat packing industries. The reason for that was that the railroads managed to connect all the major cities and the part of the country, also enabling for much quicker movement of the goods from one place to another. Since this became possible, the industries quickly developed as they were able to sell their products on much larger distances with this new method of transportation, soon becoming one of the major and most profitable industries.
It would be all of the above because all these things benefit and need the water.
Answer: Because the janitor is aware of your plight, the first thing to consider is this being a trick to extort you or to waste your time. After considering it to be a trick, you still have to consider it to be true. This makes it a game of 50:50 chance ( that is equal chance to loss or win).
To approach this situation, you have to define an agreement with the janitor. The agreement should be "send me the chemistry master and I will pay you after I have written the exam to confirm it is actually a chemistry master or pay you 1/10 of your amount if it is not, to compensate your efforts". After sending this agreement, you should focused on your studies like you're not expecting a positive response from him.
Negotiation should not be involved in the agreement, as it will waste your time of studies.
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