Cicero and wozniak use young rats in their experiment instead of older rats because young rats sare

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.

Which statement is a good description of a model? a) models are a description of nature based only on one or two variables. b) models are testable ideas but they are not very to most people. c) models are a description of nature that predicts more accurately than real events. d) models are an approximiation of a real system that omits all but most essential variables in a system.

Oil is a renewable resource can be used directly from the ground is the least polluting energy source must be removed from the earth using drills