Consider a local labor market for steelworkers.  The relationship between the wage and the quantity of steelworkers supplied is given by the equation qS = w, and the quantity of steelworkers demanded is given by the equation qD = 240 – w. Solve for the equilibrium wage, w*, and the equilibrium number of steelworkers employed, q*.  Calculate and provide here the total wages paid to steelworkers in equilibrium (without a leading $ sign).

Let’s do a basic welfare comparison between consumers and producers in a market for widgets.  Say that the relationship between the quantity of widgets supplied and the price is given by the equation qS = p – 120, while quantity demanded is given by the equation qD = 240 – p. Solve for the equilibrium price, p*, and the equilibrium number of widgets sold, q*.  Then calculate consumer surplus using the formula CS =

In this problem, we analyze production planning in two different types of widget markets.  In one city, widget production is split across many different manufacturers: these firms are in perfect competition with one another.  Here, marginal revenue per widget is constant at $4 (displayed on the left half of the marginal revenue column below).  In another city, a single firm handles widget production, and constitutes a monopoly.  Marginal revenue is decreasing, as shown in the right half of the marginal revenue column below. # of workers total product marginal revenue 1 12 $4 / $4 2 22 $4 / $4 3 31 $4 / $3 4 38 $4 / $3 5 44 $4 / $2 6 48 $4 / $2 7 51 $4 / $1 8 52 $4 / $1 Let the wage in both markets be $18.  How many workers does the firm in perfect competition hire?  .  What are total profits?  $. How many workers does the monopolist hire?  .  What are total profits?  $.

When an excise tax is introduced on a good (creating a “wedge” between the price a consumer pays and a producer receives for it), why does deadweight loss result?

Name the structures labeled as #2 on the crayfish= crayfish1.png

This phylum contains the earthwoms and leeches

Name the structure on the sea star SEASTAR1.png

The terms “critical period” or “sensitive period” (in this excerpted book chapter) refer to what?

Match the following letters with labels. plant reproduction 2edit 1.png

Pollination and fertilization are basically the same thing, they end up with an embryo being formed.