What geographical feature served as a boundary to westward settlement in 1760

What kinds of energy are causing chemical change as the meal is being prepared?

What is one main reason some governments in the twentieth century began campaigns of genocide? a) a minority group wanted total independence. b) a minority group wanted more say in lawmaking. c) a minority group had different cultural customs. d)a minority group protested against government policy.

What is the rule relating the ratio of marginal utility to prices of two goods at the optimal choice? explain why, if this rule does not hold, the choice cannot be utility-maximizing.