SOLUTION: The speed of light is approximately 3x10^8 m/sec. If the sun is 1.5x10^11 meters from earth, approximately how many seconds does it take light to reach the earth. Express your answ

Algebra ->  Linear-equations -> SOLUTION: The speed of light is approximately 3x10^8 m/sec. If the sun is 1.5x10^11 meters from earth, approximately how many seconds does it take light to reach the earth. Express your answ      Log On


   



Question 546078: The speed of light is approximately 3x10^8 m/sec. If the sun is 1.5x10^11 meters from earth, approximately how many seconds does it take light to reach the earth. Express your answer in scientific notation.
Answer by Alan3354(69443) About Me  (Show Source):
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The speed of light is approximately 3x10^8 m/sec. If the sun is 1.5x10^11 meters from earth, approximately how many seconds does it take light to reach the earth. Express your answer in scientific notation.
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d = r*t
t = d/r = 1.5E11/3E8 = 0.5E3
= 5E2 or 5%2A10%5E2 seconds