One light-minute is the distance light travels in one minute. The speed of light is about 300,000 km/s (3 × 105 km/s). How far is 5 light- minutes?
A) 90 million km (90,000,000, or 9 × 107 km)
B) 1.5 million km (1,500,000, or 1.5 × 106 km)
C) 47.3 trillion km (47,300,000,000,000, or 4.73 × 1013 km)
D) 5.4 billion km (5,400,000,000, or 5.4 × 109 km)
A
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