Source:New SAT Study GuideSAT Study Guide Explanations, Test 2; Test 2, Section 4; #15

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which is the closest to the average speed of Earth, in miles per hour, as it orbits the Sun?

The distance traveled by Earth in one orbit around the Sun is about 580,000,000 miles. Earth makes the complete orbit around the Sun in one year. Of the following, which is the closest to the average speed of Earth, in miles per hour, as it orbits the Sun?