What units are used when describing the length of time that the universe has been expanding? [CHECK ALL THAT APPLY] [A is not the only answer] billions of years millions of years light years light year

What units are used when describing the length of time that the universe has been expanding? [CHECK ALL THAT APPLY] [A is not the only answer]

billions of years
millions of years
light years
light year kilometers
decades

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What units are used when describing the length of time that the universe has been expanding? [CHECK ALL THAT APPLY] [A is not the only answer] billions of years millions of year…

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