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Question 3
A plastics monopolist faces the demand curve P=180 - Q, where Q is measured in thousands of pounds per year and P is measured in dollars per pound. Marginal cost is constant at MC=＄60 per pound.
(a)Find the monopolist's profit-maximizing price and quantity.
(b)What is the elasticity of demand at the profit-maximizing price？
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更多“Question 3A plastics monopolis…”相关的问题
第2题
everyday products such as beverage containers, toys, and furniture.The widespread use of plastics demands proper disposal of plastic waste.Plastics make up almost 13 percent of the urban solid waste stream, a dramaticincrease from 1960, when plastics were less than one percent of the wastestream. The largest category of plastics are found in containers and packaging(e.g. soft drink bottles, lids, shampoo bottles), but they are also found indurable (e.g. appliances, furniture) and nondurable goods (e.g. diapers, trashbags, utensils, and medical devices）. The recycling rate for different types ofplastics varies greatly, resulting in an overall plastic recycling rate of only8 percent, or 2.7 million tons in 2011.
Currently, the UShas the capacity to recycle plastics at a greater rate as a latest technologyhas come into being that helps in converting plastic waste disposal intoa good source of green fuel. A new process for turning plastics into fuel wasinvented. First, many different kinds of unwashed plastics are melted together.Then a special chemical is used to turn the fluid into a vapor（蒸汽）. Thisreduces the plastic to its most basic elements to make it have a high fuelvalue. It is tested that 86 percent of what goes in comes out as fuel. And 8percent of the recycled plastic is used to run the system. This technology willreduce the country’s dependence on foreign oil and theamount of plastic waste in its landfills（垃圾填埋场）．
Scientists sayplastic-to-oil technology is still new and developing. They say it is not yetknown if the process is environmentally friendly. And some question whetherturning plastics into oil can even be considered “recycling”.Carson Max is with the publication Resource Recycling, a magazine that reportson the plastic recycling industry. He says because there is a lot of plasticwaste and a great demand for oil, the recycling technology may create greatchanges in both industries. “So they’re getting value from something that would otherwise go to thelandfill, things that wouldn’t be accepted into a recycler.”
26. According to the article, the great increase in use ofplastic goods requires_______.
A. richer source of green fuel
B. more categories of durable plastics
C. faster development of plastic products
D. more efficient disposal of plastic waste
27. The word “converting” inParagraph 2 most probably means “_______”．
A. coloring
B. inventing
C. consuming
D. transforming
28. What will the plastic-to-oil technology result in？
A. Less dependence on imported oil
B. Increase in plastic waste
C. Production of more plastic goods
D.Disappearance of landfills
29. What is Carson Max’s attitude towards the plastic-to-oiltechnology？
A. Positive
B. Negative
C. Critical
D. Indifferent
30. What is the passage mainly about？
A. The important function of plastics in everyday life
B. The new technology of plastic waste disposal
C. The development of plastics industry
D. The categories of plastics
第3题
The new law poses a few challenges to manufacturers who are now rushing to set up collection networks and perfecting techniques to disassemble and recycle older products.With an eye toward the future, they are also integrating easily recycled materials into new products. Plastics, a major component of most electronicproducts,pose a particular obstacle because their quality becomes worse and worse with age,losing strengthand flexibility even if reprocessed.NEC Corp. overcomes this problem by creating a plastics sandwich, in which the filling is 100 percent recycled plastic and the outer layers a mixture of 14 percent recycled material.The resulting plastic has sufficient strength and toughness for use as a case for desktop PCs. The company, in cooperation with plastic maker Sumitomo Dow, has also developed a new plastic, which engineers claim retains its mechanical properties through repeated recycling. NEC uses the plastic, which is also flame-retardant (阻燃的) in battery cases for notebook PCs.
Meanwhile, Matsushita Electric, maker of the Panasonic brand, is avoiding plastic in favor of magnesium (镁). Magnesium, says the company, is ideal for re cycling because it retains its original strength throughrepeated reprocessing. Matsushita has developed molding techniques to form. magnesium into the case for a 21-inch TV. Unfortunately, the magnesium case and energy-saving features make the TV about twice as expensive as an ordinary model.The company hopes, however, that increased use of magnesium will eventually bring prices down.
Choose correct answers to the question:
According to the present regulations of Japan, the recycling of paper and plastic will be the responsibility of______.
A.the government
B.the manufacturers
C.the consumers
D.the sellers
Which of the following is NOT the character of plastics？A.Most electronic products contain plastics.
B.It retains its original strength through reprocessing.
C.Recycled plastics can be integrated into new products.
D.Plastics will lose flexibility after a certain period of time.
According to the passage, the term “plastic sandwich” refers to_____.A.a kind of sandwich-shaped toy made of plastics
B.a kind of plastics with different integration in each layer
C.a kind of plastics with maximum strength and flexibility
D.a kind of plastics made of 100% recycled materials
In the passage, it is implied but NOT stated that_____.A.disposing the plastics is one of NEC Corp’s businesses
B.magnesium is an ideal material for the case of TV
C.21-inch TV with magnesium case isn’t very popular so far
D.magnesium must be better than the plastics
The author writes this passage in order to_____.A.inform
B.instruct
C.predict
D.persuade
请帮忙给出每个问题的正确答案和分析，谢谢！
第4题
The new law poses a few challenges to manufacturers who are now rushing to set up collection networks and perfecting techniques to disassemble and recycle older products.With an eye toward the future, they are also integrating easily recycled materials into new products. Plastics, a major component of most electronicproducts,pose a particular obstacle because their quality becomes worse and worse with age,losing strengthand flexibility even if reprocessed.NEC Corp. overcomes this problem by creating a plastics sandwich, in which the filling is 100 percent recycled plastic and the outer layers a mixture of 14 percent recycled material.The resulting plastic has sufficient strength and toughness for use as a case for desktop PCs. The company, in cooperation with plastic maker Sumitomo Dow, has also developed a new plastic, which engineers claim retains its mechanical properties through repeated recycling. NEC uses the plastic, which is also flame-retardant (阻燃的) in battery cases for notebook PCs.
Meanwhile, Matsushita Electric, maker of the Panasonic brand, is avoiding plastic in favor of magnesium (镁). Magnesium, says the company, is ideal for re cycling because it retains its original strength throughrepeated reprocessing. Matsushita has developed molding techniques to form. magnesium into the case for a 21-inch TV. Unfortunately, the magnesium case and energy-saving features make the TV about twice as expensive as an ordinary model.The company hopes, however, that increased use of magnesium will eventually bring prices down.
Choose correct answers to the question:
According to the present regulations of Japan, the recycling of paper and plastic will be the responsibility of______.
A.the government
B.the manufacturers
C.the consumers
D.the sellers
Which of the following is NOT the character of plastics？A.Most electronic products contain plastics.
B.It retains its original strength through reprocessing.
C.Recycled plastics can be integrated into new products.
D.Plastics will lose flexibility after a certain period of time.
According to the passage, the term “plastic sandwich” refers to_____.A.a kind of sandwich-shaped toy made of plastics
B.a kind of plastics with different integration in each layer
C.a kind of plastics with maximum strength and flexibility
D.a kind of plastics made of 100% recycled materials
In the passage, it is implied but NOT stated that_____.A.disposing the plastics is one of NEC Corp’s businesses
B.magnesium is an ideal material for the case of TV
C.21-inch TV with magnesium case isn’t very popular so far
D.magnesium must be better than the plastics
The author writes this passage in order to_____.A.inform
B.instruct
C.predict
D.persuade
请帮忙给出每个问题的正确答案和分析，谢谢！
第5题
Question 3
A medium-sized city has two major industries: financial services and manufacturing of electronic equipment. Suppose that restrictions on interstate competition in the market for financial services lead to a large expansion of the financial services sector in the city.
(a)What effect do you predict that this increase in jobs would have oil wages and housing prices in the city？
(b)What effect do you think there would be on the manufacturing sector in the city？ Would you expect that manufacturing employment would rise or fall？
第6题
The new law poses a few challenges to manufacturers who are now rushing to set up collection networks and perfecting techniques to disassemble and recycle older products.With an eye toward the future, they are also integrating easily recycled materials into new products. Plastics, a major component of most electronicproducts,pose a particular obstacle because their quality becomes worse and worse with age,losing strengthand flexibility even if reprocessed.NEC Corp. overcomes this problem by creating a plastics sandwich, in which the filling is 100 percent recycled plastic and the outer layers a mixture of 14 percent recycled material.The resulting plastic has sufficient strength and toughness for use as a case for desktop PCs. The company, in cooperation with plastic maker Sumitomo Dow, has also developed a new plastic, which engineers claim retains its mechanical properties through repeated recycling. NEC uses the plastic, which is also flame-retardant (阻燃的) in battery cases for notebook PCs.
Meanwhile, Matsushita Electric, maker of the Panasonic brand, is avoiding plastic in favor of magnesium (镁). Magnesium, says the company, is ideal for re cycling because it retains its original strength throughrepeated reprocessing. Matsushita has developed molding techniques to form. magnesium into the case for a 21-inch TV. Unfortunately, the magnesium case and energy-saving features make the TV about twice as expensive as an ordinary model.The company hopes, however, that increased use of magnesium will eventually bring prices down.
Choose correct answers to the question:
According to the present regulations of Japan, the recycling of paper and plastic will be the responsibility of______.
A.the government
B.the manufacturers
C.the consumers
D.the sellers
第7题
Researchers have made significant technological progress toward increasing the
amount of plastic that plants can grow and altering the composition of the plastic to
endow it with useful properties, but achieving both a useful
Line composition and high plastic content in the plant proves to be a formidable task.
(5) The chloroplasts of the leaves have so far shown themselves to be the best
location for producing plastic, but the chloroplast is the green organelle that
captures light, and high concentrations of plastic could thus inhibit
photosynthesis and reduce grain yields, and the challenges of separating the
plastic from the plant are awesome. Given sufficient time and funding,
(10) researchers could overcome these technical obstacles, but a greater concern has
made us question whether those solutions are worth pursuing. When calculating
all the energy and raw materials required for each step of growing a
biodegradable plastic made from plant sugar polyhydroxyalkanoate in plants, we
discovered that this approach would consume even more fossil resources than
(15) most petrochemical manufacturing routes.
In a recent study, scientists found that making one kilogram of
polyhydroxyalkanoate from genetically modified corn plants would require about
300 percent more energy than the 29 megajoules needed to manufacture an
equal amount of fossil fuel-based polyethylene (PE). Given this comparison, it
(20) is impossible to argue that plastic grown in corn and extracted with energy from
fossil fuels would conserve fossil resources. What is gained by substituting the
renewable resource for the finite one is lost, through a tremendous irony, in
the additional requirement for energy. Fueling this process requires 20 to 50
percent fewer fossil resources than does making plastics from petroleum, but it
(25) is still significantly more energy intensive than most petrochemical processes
are, even though developing alternative plant-sugar sources that require less
energy to process, such as wheat and beets, would eventually attenuate the use
of fossil fuels.
The energy necessary for producing plant-derived plastics gives rise to a
(30) second, perhaps even greater, environmental concern: fossil petroleum is the
primary resource for conventional plastic production, but making plastic from
plants depends mainly on coal and natural gas used to power the corn-farming
and corn-processing industries. Any of the plant-based methods, therefore,
involves switching from a less abundant fuel (petroleum) to a more abundant
(35) one (coal). Some experts argue that this switch is a step toward sustainability.
Missing in this logic, however, is the fact that all fossil fuels used to make
plastics from renewable raw materials (corn) must be burned to generate
energy, whereas the petrochemical processes incorporate a significant portion
of the fossil resource into the final product. Burning more fossil fuels
(40) exacerbates an established global climate problem by increasing emissions of
greenhouse gases, such as CO2, and SO2, which contribute to acid rain; thus
the environmental benefit of growing plastic in plan
A．expose the fragile nature of the foundations on which bioengineering research rests
B．argue that bioengineering is ultimately infeasible as a means of manufacturing plastic
C．argue that the advances in organically-based plastic manufacture cannot solve environmental issues
D．explain the reasons for and objectives of current research on the development of organically-based plastic manufacture
E．describe the nature of the organic plastic manufacturing process
第8题
Researchers have made significant technological progress toward increasing the
amount of plastic that plants can grow and altering the composition of the plastic to
endow it with useful properties, but achieving both a useful
Line composition and high plastic content in the plant proves to be a formidable task.
(5) The chloroplasts of the leaves have so far shown themselves to be the best
location for producing plastic, but the chloroplast is the green organelle that
captures light, and high concentrations of plastic could thus inhibit
photosynthesis and reduce grain yields, and the challenges of separating the
plastic from the plant are awesome. Given sufficient time and funding,
(10) researchers could overcome these technical obstacles, but a greater concern has
made us question whether those solutions are worth pursuing. When calculating
all the energy and raw materials required for each step of growing a
biodegradable plastic made from plant sugar polyhydroxyalkanoate in plants, we
discovered that this approach would consume even more fossil resources than
(15) most petrochemical manufacturing routes.
In a recent study, scientists found that making one kilogram of
polyhydroxyalkanoate from genetically modified corn plants would require about
300 percent more energy than the 29 megajoules needed to manufacture an
equal amount of fossil fuel-based polyethylene (PE). Given this comparison, it
(20) is impossible to argue that plastic grown in corn and extracted with energy from
fossil fuels would conserve fossil resources. What is gained by substituting the
renewable resource for the finite one is lost, through a tremendous irony, in
the additional requirement for energy. Fueling this process requires 20 to 50
percent fewer fossil resources than does making plastics from petroleum, but it
(25) is still significantly more energy intensive than most petrochemical processes
are, even though developing alternative plant-sugar sources that require less
energy to process, such as wheat and beets, would eventually attenuate the use
of fossil fuels.
The energy necessary for producing plant-derived plastics gives rise to a
(30) second, perhaps even greater, environmental concern: fossil petroleum is the
primary resource for conventional plastic production, but making plastic from
plants depends mainly on coal and natural gas used to power the corn-farming
and corn-processing industries. Any of the plant-based methods, therefore,
involves switching from a less abundant fuel (petroleum) to a more abundant
(35) one (coal). Some experts argue that this switch is a step toward sustainability.
Missing in this logic, however, is the fact that all fossil fuels used to make
plastics from renewable raw materials (corn) must be burned to generate
energy, whereas the petrochemical processes incorporate a significant portion
of the fossil resource into the final product. Burning more fossil fuels
(40) exacerbates an established global climate problem by increasing emissions of
greenhouse gases, such as CO2, and SO2, which contribute to acid rain; thus
the environmental benefit of growing plastic in plan
A．expose the fragile nature of the foundations on which bioengineering research rests
B．argue that bioengineering is ultimately infeasible as a means of manufacturing plastic
C．argue that the advances in organically-based plastic manufacture cannot solve environmental issues
D．explain the reasons for and objectives of current research on the development of organically-based plastic manufacture
E．describe the nature of the organic plastic manufacturing process
第10题
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