In managerial accounting, variable cost is a reasonable approximation of marginal cost in many situations

______ is the process of strengthening a behavior by contingently withdrawing something displeasing.

A. Extinction B. Negative Reinforcement C. Punishment D. Positive Reinforcement E. Respondent Behavior

At the end of week 10, this project has cost $9,000 and has an earned value as indicated in the table. Use the data to calculate the cost performance index for the project. All amounts are in thousands of dollars

A) 2.5 B) 2.1 C) 1.8 D) 1.5