10. Figure 5 shows the graph of the short-run cost curves for Tim-T-Shirts, a firm operating in a perfectly competitive market. P* denotes the current price for Tim T-Shirts. Based on the information in the graph, which of the following should we expect in the long run? a) New firms will enter the market. b) The number of firms in the market will remain unchanged. c) Gray Sweaters will increase the current price of sweaters. d) There is not enough information to answer the question. Figure 5 Price and Costs P* MC ATC AVC Quantity

Suppose that the market for microwave ovens is a competitive market. The following graph shows the daily cost curves of a firm operating in this market.

Consider the competitive market for steel. Assume that, regardless of how many firms are in the industry, every firm in the industry is identical and faces the marginal cost (MC), average total cost (ATC), and average variable cost (AVC) curves shown on the following graph. (?) 100 90 80 70 60 50 40 ATC 30 20 MCO AVC 10 + 5 10 15 20 25 30 35 40 45 50 QUANTITY (Thousands of tons) The following diagram shows the market demand for steel. Use the orange points (square symbol) to plot the initial short-run industry supply curve when there are 20 firms in the market. (Hint: You can disregard the portion of the supply curve that corresponds to prices where there is no output since this is the industry supply curve.) Next, use the purple points (diamond symbol) to plot the short-run industry supply curve when there are 30 firms. Finally, use the green points (triangle symbol) to plot the short-run industry supply curve when there are 40 firms. 100 90 Supply (20 firms) 80 70 E 60 Supply (30…

Suppose that YouYeet is one of over a dozen competitive firms in the Oviedo area that offers moving truck rentals.   Based on the preceding graph showing the weekly market demand and supply curves, the price YouYeet must take as given is   .   Fill in the price and the total, marginal, and average revenue YouYeet earns when it rents 0, 1, 2, or 3 trucks during move-in week. Quantity Price Total Revenue Marginal Revenue Average Revenue (Trucks) (Dollars per truck) (Dollars) (Dollars) (Dollars per truck) 0   0   –   1         2         3           The demand curve faced by YouYeet is identical to which of its other curves? Check all that apply.   Supply curve   Marginal revenue curve   Average revenue curve   Marginal cost curve

The blue curve on the following graph represents the demand curve facing a firm that can set its own prices. Use the graph input tool to help you answer the following questions. You will not be scored on any changes you make to this graph. Note: Once you enter a value in a white field, the graph and any corresponding amounts in each grey field will change accordingly. PRICE (Dollars per unit) 100 TOTAL REVENUE (Dollars) 90 80 20 10 0 1250 1125 1000 875 750 625 500 On the previous graph, change the number found in the Quantity Demanded field to determine the prices that correspond to the production of 0, 10, 20, 25, 30, 40, or 50 units of output. Calculate the total revenue for each of these production levels. Then, on the following graph, use the green points (triangle symbol) to plot the results. 375 250 125 + 0 0 0 Demand 5 10 15 20 25 30 35 40 45 50 QUANTITY (Units) + 5 20 10 15 25 30 35 QUANTITY (Number of units) 40 Graph Input Tool Market for Goods 45 50 Quantity Demanded (Units)…

Suppose a corn dog stand market is perfectly competitive and in long-run equilibrium. One day, the city starts imposing a $300 per year tax on each stand. How does this policy impact the number of corn dogs produced and sold in the market in the short run and long run? Down in the short run and no change in the long run No change in the short run and down in the long run Up in the short run and no change in the long run No change in the short run and up in the long run

The following graph plots daily cost curves for a firm operating in the competitive market for jumpsuits. Hint: Once you have positioned the rectangle on the graph, select a point to observe its coordinates. PRICE (Dollars per jumpsult) 50 45 40 35 30 25 20 15 10 5 10 W 0 Y ATC AVC 2 MC 4 8 QUANTITY (Thousands of jumpsuits per day) 6 10 + 14 16 18 12 20 Profit or Loss In the short run, given a market price equal to $15 per jumpsuit, the firm should produce a daily quantity of of On the preceding graph, use the blue rectangle (circle symbols) to fill in the area that represents profit or loss of the firm given the market price of $15 and the quantity of production from your previous answer. Note: In the following question, enter a positive number regardless of whether the firm earns a profit or incurs a loss. The rectangular area represents a rt-run thousand per day for the firm. jumpsuits.

Consider a price-searching firm, Sam’s Fire Engines, which sells fire engines in the fictional country of Pyrotania. Initially, Sam’s produced seven fire engines but then decided to increase production to eight fire engines. The following graph shows the demand curve the firm faces. To sell the additional engine, Sam’s must lower its price from $100,000 to $50,000 per engine. (Hint: Sam’s Fire Engines gains revenue from the additional engine it sells, but it also loses revenue from the initial seven engines because it sells them all at the lower price.) On the following graph, use the purple rectangle (diamond symbols) to shade the area representing the revenue lost from the initial seven engines by selling at $50,000 rather than $100,000. Then use the green rectangle (triangle symbols) to shade the area representing the revenue gained from selling an additional engine at $50,000.

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Suppose Hubert runs a small business that manufactures shirts. Assume that the market for shirts is a price-taker market, and the market price is $10 per shirt. The following graph shows Hubert's total cost curve. Use the blue points (circle symbol) to plot total revenue, and the green points (triangle symbol) to plot profit for the first seven shirts that Hubert produces, including zero shirts. TOTAL COST AND REVENUE (Dollars) 125 100 75 50 25 -25 -50 0 0 1 2 ☐ ■ U 3 4 5 QUANTITY (Shirts) L 6 Total Cost 7 8 Total Revenue Profit ? Calculate Hubert's marginal revenue and marginal cost for the first seven shirts he produces, and plot them on the following graph. Use the blue points (circle symbol) to plot marginal revenue and the orange points (square symbol) to plot marginal cost.