Use the given information to complete parts i and ii. in your final answer, include all calculations. planet earth has an approximate diameter of 1.2742 · 10 10 millimeters. the sun has a diameter of 1.391 · 10 6 kilometers. part i: given that for every one kilometer there are 1,000,000 millimeters, which unit of measurement should be used to best represent the lengths of the sun and earth's diameters? part ii: approximate how many times greater the sun's diameter is than planet earth's.