1. Mathematics it's important, we will need mathematics in our activity everyday. like a simple mathematics, we want to cook and we go to the shop, then we need knowledge simple mathematics for calculating the price, amount of material, time and etc. not only for calculating in personal life but also for activites and for daily needs.
2. The electric streetcar was very popular from 1880 until now the transportation is very widely used among major cities in the USA. besides the price is not expensive and it saves time for passengers. it could be profitable for the company and can replace ground transportation better for the future.
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