Rational choice by an individual implies Group of answer choices The use of a mathematical model when solving a problem Making decisions aimed at achieving some predetermined goal That only monetary costs and benefits are weighed That the individual will never regret any action taken That scarcity can be eliminated for that individualIn economics, the term marginal usually refers to Group of answer choices A small change in an economic variable A low-quality product or resource An unimportant and irrelevant economic variable An all-or-nothing economic decision A footnote or minor point