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Neptune is 2,798,842,000 miles from the sun. How many hours does it take lightto travel from the sun to Neptune?

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Answer:

4.17 hours

Explanation:

The speed of light is about 670,616,629.4 miles per hour, so the travel time to Neptune is ...

(2,798,842,000 mi)/(670,616,629.4 mi/h) ≈ 4.17 h

It takes about 4.17 hours for light to travel from the sun to Neptune.

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