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29. How much time (in seconds) does it take light in a vacuum to travel 1.00 billion km? a) 3.00 x 1017 b) 3.33 s c) 3.33 x 10's d) 3.00 x 1020
29. How much time (in seconds) does it take light in a vacuum to travel 1.00 billion km? a) 3.00 x 1017 b) 3.33 s c) 3.33 x 10's d) 3.00 x 1020
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