Which is the most reasonable measurement of the distance between the tracks on a railroad: 1.435 • 10 to the negative 3rd power or 1.435 • 10 to the 3rd power? I really need help with this and I don't get what it's asking ):

Question

Which is the most reasonable measurement of the distance between the tracks on a railroad: 1.435 • 10 to the negative 3rd power or 1.435 • 10 to the 3rd power?   I really need help with this and I don't get what it's asking ):

jchick · Answer

They are looking for you to find a prospective here they want you to say which one of these would likely be the sizing for the track.