One Light- Hour Is the Distance Light Travels in One

Multiple Choice

One light- hour is the distance light travels in one hour. The speed of light is about 300,000 km/s (3 × 105 km/s) . How far is 1 light- hour?

A) 9) 46 trillion km (9,460,000,000,000, or 9.46 × 1012 km)
B) 1) 08 billion km (1,080,000,000, or 1.08 ×109 km)
C) 18 million km (18,000,000, or 1.8 × 107 km)
D) 300 thousand km (300,000, or 3 × 105 km)