Question

The equation T^2=A^3 shows the relationship between a planet’s orbital period, T, and the planet’s mean distance from the sun, A, in astronomical units, AU. If planet Y is twice the mean distance from the sun as planet X, by what factor is the orbital period increased? 

Answer 1

T^2 = A^3
T^2 = 2^3
T^2 = 8
Time = sq root (8)
Time = 2.8284271247