SOLUTION: The distance from the Earth to the Sun is 1.496×10^11 metres. The speed of light is 3×10^88 metres per second. Show that, correct to 3 significant figures, light will take 0.139

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Question 1074485: The distance from the Earth to the Sun is 1.496×10^11 metres.
The speed of light is 3×10^88 metres per second.
Show that, correct to 3 significant figures, light will take 0.139 hours to travel from the Sun to the Earth.
Found 2 solutions by Alan3354, josgarithmetic:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
The distance from the Earth to the Sun is 1.496×10^11 metres.
The speed of light is 3×10^88 [sic] --- it's 3e8 m/sec --- metres per second.
Show that, correct to 3 significant figures, light will take 0.139 hours to travel from the Sun to the Earth.
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d = r*t
t =~ d/r = 1.496e11/3e8 seconds = 1.496e3/3 seconds
1 hour = 3600 seconds
t =~ 1496/(3*3600) hours

Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
CORRECTION: The speed of light is 3×10^88 3x10^8 metres per second.

%28%281.496%2A10%5E11%29%2F%283%2A10%5E8%29%29seconds%281%2F3600%29%28hour%2Fseconds%29

%280.498666%2A10%5E3%29%281%2F3600%29hour

1.38519%2A10%5E%28-4%29%2A10%5E3

1.38519%2A10%5E%28-1%29

0.139, hour, to three significant figures.