Biologists found a new species of pale shrimp at the world's deepest undersea vent, the Beebe Vent Field. The vent is 3.1 miles below the sea's surface. Approximately how many kilometers below the sea's surface is the vent?
Correct answer: D. 5
- A. 2
- B. 3
- C. 4
- D. 5
Explanation
Choice D is correct. It's given that 1 kilometer is approximately equivalent to 0.6214 miles. Let x be the number of kilometers equivalent to 3.1 miles. The proportion 1 kilometer / 0.6214 = x kilometer / 3.1 miles can be used to solve for the value of x. Multiplying both sides of this equation by 3.1 yields 3.1/ 0.6214 = x, or x ≈ 4.99. This is approximately 5 kilometers.
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Quantitative reasoning applies arithmetic and basic algebra to numerical relationships, including percentages, ratios, averages, fractions, proportions, profit and loss, rates, time, work and measurement. Questions focus on translating words into equations, choosing an efficient method and checking whether the result is numerically reasonable.
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