Use the following to answer questions: 
-(Table: Total Product and Marginal Product) Look at the table Total Product and Marginal Product. The marginal product of the fourth worker is _____ units.
Definitions:
Premenstrual Dysphoric Disorder
A disorder marked by repeated experiences of significant depression and related symptoms during the week before menstruation.
Diagnosis
A determination that a person’s problems reflect a particular disorder.
Controversial
Marked by or causing controversy; debatable or disputed, often due to differing opinions and views.
DSM-5
The Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, a comprehensive classification and diagnostic tool used by mental health professionals.
Q90: The break-even price for a perfectly competitive
Q116: The market for breakfast cereal contains hundreds
Q122: (Figure: A Perfectly Competitive Firm in the
Q145: In perfect competition, _ are _, and
Q147: (Table: Short-Run Supply Curve) Look at the
Q199: Sam is one of many growers who
Q206: (Table: Production Function for Soybeans) Look at
Q232: (Table: Utility from Burgers and Milkshakes) Look
Q271: Consider a perfectly competitive firm in the
Q276: (Table: Variable Costs for Lawns) Look at