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• cecilia has studied economics and knows about the value and investment potential of diamonds. the price of diamonds has recently decreased, and a new diamond mine has opened nearby. cecilia decides to buy a diamond necklace while the prices are lower. how did cecilia’s knowledge of economics help her make a savvy commodity purchase? she knew that diamonds are popular and in high demand. she knew that diamonds are a nonrenewable resource, making them scarce. she knew that the cost of diamonds depends only on the demand. she knew that the purchase of diamonds will satisfy wants and needs.
  
• a decibel is a logarithmic unit that can be used to measure the intensity of a sound. the function y = 10logx gives the intensity of a sound in decibels, where x is the ratio of the intensity of the sound to a reference intensity. the reference intensity is generally set at the threshold of hearing. use the graphing utility to graph the decibel function. the sound intensity of rustling leaves is 100 times the reference intensity. use your graph to determine the sound intensity of rustling leaves in decibels. decibels
  
• which of the following is not a source of air pollution related to human activities? a. gasoline b. garbage c. forest fires d. radon
  
• that's just the tip of the iceberg"" is a popular expression you may have heard. it means that what you can see is only a small part of the overall problem. as the diagram shows, most of an iceberg is actually out of sight, below the water level. based on this diagram, what is the most likely density of the iceberg? (assume a density of 1.03 g/ml for seawater.)
  
• during the test, simply writing down one or two key words from your practice outline may help you to remember the rest of the outline.
  
• which energy pathway can a person without the ability to see color work in? generation distribution transmission nuclear power
  
• samek was driving to work when he suddenly felt paralyzed and couldn t resist
  
• a carnot air conditioner operates between an indoor temperature of 20°c and an outdoor temperature of 39°c. how much energy does it need to remove 2000 j of heat from the interior of the house?
  
• what do the following lines from the play everyman refer to? when the body lieth in clay. here shall you see how fellowship and jollity, both strength, pleasure, and beauty, will fade from thee as flower in may. a. the corrupt nature of discretion b. the enduring nature of happiness c. the fleeting nature of earthly pleasures d. the transient nature of summer flowers e. the delicate nature of fellowship
  
• to make their language as precise as possible, writers should consider the , or suggested meanings, of words.