Physics

Problem

Planets X and Y orbit the same star. The average distance between planet X and the star is five times greater than the average distance between planet Y and the star. What is

\frac{\text{orbital period of planet X}}{\text{orbital period of planet Y}}

? A.

\sqrt[3]{5}

\sqrt{5}

\sqrt[3]{5^2}

\sqrt{5^3}

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