How is representation determined in the house of representatives and the senate?

In the Senate, each state gets 2 representatives. In the House of Representatives, the number of representatives per state is based on the population. This is determined from the census every ten years. Google

Ghana, first of the great medieval trading empires of western africa (fl. 7th–13th century). it was situated between the sahara and the headwaters of the sénégal and niger rivers, in an area that now comprises southeastern mauritania and part of mali.