SOLUTION: Use the speed of light as c = 3 × 10^8 m/s when needed. The nearest star to the Sun is Proxima Centauri, at a distance of 4.5 light years. How many times farther is this than th

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Question 943875: Use the speed of light as c = 3 × 10^8 m/s when needed.
The nearest star to the Sun is Proxima Centauri, at a distance of 4.5 light years. How many times farther is this than the Earth-Sun distance =1.5 × 10^11 m?
Round your answer to the nearest order of magnitude.
Answer by lwsshak3(11628) About Me  (Show Source):
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Use the speed of light as c = 3 × 10^8 m/s when needed.
The nearest star to the Sun is Proxima Centauri, at a distance of 4.5 light years. How many times farther is this than the Earth-Sun distance =1.5 × 10^11 m?
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4.5%28light+Years%29%2A365%28days%2Fyear%29%2A24%28hours%2Fday%29*3600(sec/hour)*(3*10^8)(m/sec)=4.5*3.65*2.4*3.6*10^6*3*10^8=425.736*10^16 m
Distance to Proxima Centauri/Earth-Sun distance
(425.736*10^16)/(1.5*10^11)=283.82*10^6=2.83*10^8
How many times farther is this star than the Earth-Sun distance? 2.83*10^8