a heuristic is a(n) a. technique to improve memory and mental processing b. shortcut to problem solving, also known as a "rule of thumb" c. precise, step-by-step set of rules that will reliably generate a solution to a problem d. analytical technique based on self-knowledge and self-reflection

The photo shows a shopping mall in beijing, china. inside, there are food sites selling pizza and hamburgers and closing stores selling blue jeans and basketball sneakers. these items have become popular around the world because

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

Black death spread because of what problem in medieval europe? which one is it i need the answer quick . a- overcrowded cities b-too many farm animals c-not enough qualified doctors d-all of the above