HELP PLS. one paragraph explaining how a command economy works.

An atom of element a has 73 protons. what would the element's atomic number be?

8) this map shows the population density of india. the redder the area, the higher the concentration of the population. which is the most likely reason for the high population density in the northeastern part of india? a) there is little pollution there b) the ganges river is in the region c) most of the factories are located in that region d) most people want to live close to the himalaya mountains

The persians landed in the plains near athens. as their army greatly outnumbered that of the greeks, the greeks hoped to find aid from nearby sparta. a long-distance runner named pheidippides was sent from athens to sparta to request , but the spartans were not able to send more soldiers at the time. regardless, the greeks were still able to win the battle. centuries later, legend developed that a runner had been sent from the battle to athens after the greek victory. after reaching athens, the runner proclaimed, "we are victorious! " and then fell to the ground and died. this legendary story is the inspiration for the modern long-distance runs that are performed today. this passage refers to the events of which battle during the persian wars? a. battle of thermopylae b. battle of salamis c. battle of plataea d. battle of marathon