Question 1207558
One light-year is defined by astronomers to be the distance that a beam of light will travel in 1 year (365 days).
If the speed of light is 186,000 miles per second, how many miles are in a light-year? Express your answer in scientific notation.
1.86(10^5) * 365 * 24 * 3600 = 5.87(10^12) miles
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2. How long does it take a beam of light to reach Earth from the Sun when the Sun is 93,000,000 miles from Earth? Express your answer in seconds, using scientific notation. 
{{{(9.3(10^7))/1.86(10^5)}}} = 5(10^2)