<PRE><B>Question 149808</B>
The key is to know that T^2/R^3 has the value 1 for all planets in the Solar System.
.
Knowing this we can now have the following relationship:
1 = T^2/0.723^3
.
Solving for T:
1 = T^2/0.723^3
0.723^3 = T^2
sqrt(0.723^3) = T
0.615 years = T

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