Answer: Discount rates are used to determine today's value of money paid or received at some future time.
This calculation is used in the cost-benefit analysis in order to place all economic flows of a project that occur at different points in time into a single year currency so that costs and benefits can be compared.
The rates used are typically around 10%, but try to analyze them with other rates between 5% and 15% to determine if the viability of the project is sensitive to the discount rate. It is defined by World Bank or the government of the country concerned.
Simply, they united because coming together would be the only way to defeat Persia, or else they would lose separately. Hopefully this helped!
The Arrival of the Europeans has been studied and proven to be the reason for the decline in the Native American population. About 500 years ago when Columbus Arrived in the Americas is when the decline started. From the transportation of diseases and common cold, to the wars fought over land, the population received it's biggest decrease after the arrival the foreigners.
The British wanted to create colonies in India where British people could settle and gain foot there. Colonization involved the British being able to control the country and gain from it-- especially financially.