How many seismic stations are needed to determine the location of an earthquake's epicenter?

Who owned most of the resources in a market or capitalistic economy? in a socialist or command economy? what determines ownership in a traditional economy. (economies)

Heyi am new to are you all americans? ( just want to know , i don't mean any offence ) ?

Which characteristics of temperature and salinity have the greatest influence on the movement of deep-ocean currentsa. warm and low salinityb. cold and high salinityc. cold and low salinityd. warm and high salinity