Question

The distance from Earth to Neptune is approximately 4.3514×1012 meters. Select from the drop-down menu to correctly complete the statement. The distance from Earth to Neptune is approximately 4.3514×109 millimeters, centimeters, meters, or kilometers (which one is it)?

Answer 1

The correct answer would be 4.3514 x
`10^(9)` kilometers.

As we know, 1 kilometer = 1000 meters or
`10^(3)` meters.

Hence, 1 meter =
`10^(-3)` kilometer

So, 4.3514 x
`10^(12)` meters = 4.3514 x
`10^(12)` x
`10^(-3)` kilometers,

which comes out to be 4.3514 x
`10^(9)` kilometers.

Answer 2

The answer is 4.315 billion kilometers so it would be 4.315 x 10 to the 9th power if that is what is meant and Neptune is the eighth planet outward from the sun (the most distant planet from the sun) so it is a tremendous distance from the earth and would be very hard for humans to reach with such a distance.