C. $8.
D. $9.
The marginal revenue product is the change in revenue earned due to the hiring of one
more input. In this case, the fifth worker adds 4 units of output (i.e., 23 – 19) and $9 of
revenue because revenue rises from $152 to $161.
With a downsloping demand curve and an upsloping supply curve for a product, an
increase in consumer income will:
A. increase equilibrium price and quantity if the product is a normal good.
B. decrease equilibrium price and quantity if the product is a normal good.
C. have no effect on equilibrium price and quantity.
D. reduce the quantity demanded but not shift the demand curve.
U.S. currency has value primarily because it:
A. is legal tender, is generally acceptable in exchange for goods or services, and is
backed by the gold and silver of the federal government.
B. is generally acceptable in exchange for goods or services, is backed by the gold and
silver of the federal government, and facilitates trade.
C. is relatively scarce, is legal tender, and is generally acceptable in exchange for goods
and services.