Scientist use "c" to denote the speed of light. For example: E=MC2 Energy = Mass time the speed of light squared.
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One light year is approximately equal to seven trillion miles. So, 23 million light years is approximately equal to 161 quintillion miles. In scientific notation, that is 1.61 x 1020 miles.
6.04*102 ly
The age of the Earth is approximately 4.54 billion years, which can be represented in scientific notation as 4.54 x 10^9 years.
It is: 13,700,000,000 years or 1.37*1010 years in scientific notation
1.577836800*109