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Answer:
12.8 light-years
Step-by-step explanation:
Multiply the distance by the conversion factor.
(1.208×10^14 km) × (1 light-year)/(9.461×10^12 km)
= (1.208/9.461)×10^(14-12) light-year ≈ 12.8 light-year
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Additional comment
The term "standard form" in this context is somewhat ambiguous. In some parts of the world, "standard form" is "scientific notation." In that form, the distance is 1.28×10^1 light years.
