Technological improvements have made electric cars far more cost-efficient in the last decade. However, the threshold of economic viability for electric cars (that is, the cost of running an electric car compared to a gasoline powered car) has remained unchanged.Which of the following, if true, does most to help explain why the increased cost-efficiency of electric cars has not decreased its threshold of economic viability?
Answer(s): C
Improvements in electric cars have been matched by improvements in gasoline-powered cars so that their economic viability has not improved.
Generally, marine biologists enter their field with the goal of doing important new research. They expect their colleagues to have similar goals. Therefore, when any marine biologist becomes a household name in the field of documentary nature films, most other scientists conclude that this biologist should no longer be regarded as a true colleague. The explanation offered above for the low esteem in which marine biologists who make documentary films are held by research scientists assumes that
Answer(s): D
The conclusion that biologists who make documentaries should no longer be regarded as true colleagues is based on the assumption that such biologists will not longer do important new research
New stores financed by investors have a much lower failure rate than stores financed by other means. Source of financing, therefore, must be a more important causative factor in the success of a new store than are such factors as the location of the store, the quality of the staff, or the choice of merchandise. Which of the following, if true, most seriously weakens the argument above?
Answer(s): E
The best answer is E. The argument is that source of financing must be a more important causative factor in the success of a new store than other factors. Choice E suggests that it is not the source of financing that makes the difference, rather that investors are more likely to finance new stores in which the other factors - good locations, good quality of staff etc. - are good.
The proportion of Afro-American students enrolled in Gilmore Community College has increased over the past decades. This is partly shown by the fact that in 1965, only 6 percent of Afro-American between twenty and twenty-three in the town of Gilmore were enrolled in college, while in 1997, 13 percent of the Afro-Americans between twenty and twenty-three were enrolled in Gilmore Community College.To evaluate the argument above, it would be most useful to compare 1965 and 1997 with regard to which of the following characteristics
The best answer is D. The argument presents a substantial increase in the proportion of Afro-Americans between twenty and twenty-three who were enrolled in Gilmore Community College as evidence that there was an increase in the proportion of Gilmore Community College students who were Afro-Americans. This evidence would lack force if a similar increase in college enrollment had occurred among students who are not Afro- American.
When three Indian-owned trains purchased from Transcontinental Trains crashed within a two month time period, the Indian parliament ordered the acquisition of three new Transcontinental trains as replacements. This decision surprised many because it is customary for users to shun a product after it is involved in accidents.Which of the following, if true, provides the best indication that the decision of the Indian government was well supported?
Answer(s): B
The best answer is B. If the train crashes were caused by a factor that had nothing to do with the train itself, such as sabotage, and the quality of the train decreased the number of fatalities, then there is good reason to purchase additional trains from Transcontinental.
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