Discussion
The ratio of the distance of the sun from the earth to that of the moon from the earth is of the order of
Answer: B
The ratio is of the order of \(10^{3}\).
The Sun is about \(1.5 \times 10^{11}\) m from the Earth and the Moon about \(3.84 \times 10^{8}\) m:
\[ \frac{1.5 \times 10^{11}}{3.84 \times 10^{8}} \approx 390 \]
Since \(\log_{10}390 \approx 2.6\), the nearest power of ten is \(10^{3}\). The larger powers would put the Sun millions of times farther than the Moon, and \(10^{-4}\) inverts the ratio.
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