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Physics, 23.08.2019 07:00 jocelyntucker

Approximately how long is a light-year?
a. 9.5 billion km
b. 95 billion km
c. 9.5 trillion km
d. 95 trillion km

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Approximately how long is a light-year?
a. 9.5 billion km
b. 95 billion km
c....

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