Which of the following conversion factors would you use to change 18 meters to kilometers?
a. 1000 m/1 km
b. 1 km/1000 m
c. 100 m/1 km
d. 1 km/100 m

In converting a number with the unit of meter into kilometer we must use the conversion factor 1 km per 1000 meters.This is because in 1 kilometer there are 1000 meters and then the unit to be converted is already in meter so we need to divide it for us to convert.

Your answer is a because that is true

You should never redesign your experiment. try and see what in your experiment you made a mistake on or try and test your experimemt with somebody else. see if they get the right results.