Two Planets Are Orbiting a Star in a Distant Galaxy

Multiple Choice

Two planets are orbiting a star in a distant galaxy. The first has a semimajor axis of 150 *10⁶ km, an eccentricity of 0.20, and a period of 1.0 Earth years. The second has a semimajor axis of 250 *10⁶ km, an eccentricity of 0.30, and a period of:

A) 0.46 Earth yr
B) 0.57 Earth yr
C) 1.4 Earth yr
D) 1.8 Earth yr
E) 2.2 Earth yr