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OG19-数学分册
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Points A, B, C, and D, in that order, lie on a line. If AB= 3 cm, AC= 4 cm, and BD= 6 cm, what is CD, in centimeters?
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OG19-数学分册
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Company C produces toy trucks at a cost of $5.00 each for the first 100 trucks and $3.50 for each additional truck. If 500 toy trucks were produced by Company C and sold for $10.00 each, what was Company C's gross profit?
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OG19-语文分册 OG20-语文分册
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According to the passage, traditional corporate leaders differ from leaders in learning organizations in that the former
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OG19-数学分册
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A group of store managers must assemble 280 displays for an upcoming sale. If they assemble 25 percent of the displays during the first hour and 40 percent of the remaining displays during the second hour, how many of the displays will $$\underline {not}$$ have been assembled by the end of the second hour?
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OG19-语文分册 OG20-语文分册
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According to the author of the passage, corporate leaders of the future should do which of the following?
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OG19-数学分册
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The maximum recommended pulse rate R, when exercising, for a person who is x years of age is given by the equation $$ R = 1 76 - 0.8x$$ . What is the age, in years, of a person whose maximum recommended pulse rate when exercising is 140?
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OG19-数学分册
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Guadalupe owns 2 rectangular tracts of land. One is 300 m by 500 m and the other is 250 m by 630 m. The combined area of these 2 tracts is how many square meters?
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OG19-数学分册
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There are five sales agents in a certain real estate office. One month Andy sold twice as many properties as Ellen, Bob sold 3 more than Ellen, Cary sold twice as many as Bob, and Dora sold as many as Bob and Ellen together. Who sold the most properties that month?
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OG19-语文分册 OG20-语文分册
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According to the passage, small downward shifts in the demand for labor will not usually cause unemployment because
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OG19-数学分册
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A certain work plan for September requires that a work team, working every day, produce an average of 200 items per day. For the first half of the month, the team produced an average of 150 items per day. How many items per day must the team average during the second half of the month if it is to attain the average daily production rate required by the work plan?
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OG19-数学分册
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For every even positive integer m, f(m) represents the product of all even integers from 2 tom, inclusive. For example, $$f(12) = 2 \times 4 \times 6 \times 8 \times 10 \times 12$$. What is the greatest prime factor of f(24) ?
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In 1994, a team of scientists led by David McKay began studying the meteorite ALH84001, which had been discovered in Antarctica in 1984. Two years later, the McKay team announced that ALH84001, which scientists generally agree originated on Mars, contained compelling evidence that life once existed on Mars. This evidence includes the discovery of organic molecules in ALH84001, the first ever found in Martian rock. Organic molecules-complex, carbon-based compoundsform the basis for terrestrial life. The organic molecules found in ALH84001 are polycyclic . aromatic hydrocarbons, or PAHs. When microbes die, their organic material often decays into PAHs. Skepticism about the McKay team's claim remains, however. For example, ALH84001 has been on Earth for 13,000 years, suggesting to some scientists that its PAHs might have resulted from terrestrial contamination. However, McKay's team has demonstrated that the concentration of PAHs increases as one looks deeper into ALH84001 , contrary to what one would expect from terrestrial contamination. The skeptics' strongest argument, however, is that processes unrelated to organic life can easily produce all the evidence found by McKay's team, including PAHs. For example, star formation produces PAHs. Moreover, PAHs frequently appear in other meteorites, and no one attributes their presence to life processes. Yet McKay's team notes that the particular combination of PAHs in ALH84001 is more similar to the combinations produced by decaying organisms than to those originating from nonbiological processes.
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OG19-数学分册
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In pentagon PQRST, $$PQ = 3$$, $$QR= 2$$, $$RS= 4$$, and $$ST= 5$$. Which of the lengths 5, 10, and 15 could be the value of PT ?
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OG19-数学分册
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3, k, 2, 8, m, 3
The arithmetic mean of the list of numbers above is 4. If k and m are integers and $$ k\neq m$$, what is the median of the list?
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OG19-数学分册
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$$2x+ y = 12$$
$$|y| \le 12$$
For how many ordered pairs (x,y) that are solutions of the system above are x and y both integers?
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OG19-语文分册
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The primary purpose of the passage is to
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OG19-语文分册
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The passage asserts which of the following about the claim that ALH84001 originated on Mars?
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OG19-语文分册
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Which of the following best describes the function of the last sentence of the first paragraph?
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OG19-语文分册
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The passage suggests that McKay's team would agree with which of the following regarding the PAHs produced by nonorganic processes?
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OG19-语文分册 OG20-语文分册
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The passage suggests that which of the following is partially responsible for the difficulty in establishing the precise date when the fur trade in North America began?
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