speed of light = 3.0 x 108 m/s
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Scientist use "c" to denote the speed of light. For example: E=MC2 Energy = Mass time the speed of light squared.
1.86 x 10^5 miles per second (approximate)
It is about: 1.86*10^5 miles per second
9.8 x 108
It is: 9.5*10^12 km in scientific notation