SAT Math Multiple Choice Question 481: Answer and Explanation

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Question: 481

1. Oceans, seas, and bays represent about 96.5% of Earth's water, including the water found in our atmosphere. If the volume of the water contained in oceans, seas, and bays is about 321,000,000 cubic miles, which of the following best represents the approximate volume, in cubic miles, of all the world's water?

  • A. 308,160,000
  • B. 309,765,000
  • C. 332,642,000
  • D. 334,375,000

Correct Answer: C



Difficulty: Easy

Category: Problem Solving and Data Analysis / Rates, Ratios, Proportions, and Percentages

Strategic Advice: You can use the formula whenever you know two out of the three quantities.

Getting to the Answer: The clue "all" tells you that the "whole" is what you don't know. The percent is 96.5, and the part is 321,000,000.

The answer choices are rounded to the nearest thousand, so the answer is 332,642,000.

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