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Approximately how long is one astronomical unit (1 a.u.)?

1. 174,000,000 km /108,118,587 miles
2. 8,000,000 km/ 4,970,969 miles
3. 149,597,000 km/ 92,955,266 miles
4. 878,000,000 km/ 545,563,907 miles

Answer

The correct answer is C) 149,597,000 km/ 92,955,266 miles.

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