1kilometer=

a)1,000centimeters
b)1,000,000 millometers
c)100 meters

A kilometer equals 1,000 meters or 1 million millimeters.

http://lamar.colostate.edu/~hillger/common.html

Thank you so much that really helped me

To convert kilometers to other units of length, follow these steps:

1. Determine the conversion factor between kilometers and the desired unit.
a) 1 kilometer is equal to 1,000 meters.
b) 1 kilometer is equal to 1,000,000 millimeters.
c) 1 kilometer is equal to 100,000 centimeters.

2. Use the conversion factor to perform the conversion:
a) 1 kilometer * 1,000 meters/kilometer = 1,000 meters.
b) 1 kilometer * 1,000,000 millimeters/kilometer = 1,000,000 millimeters.
c) 1 kilometer * 100,000 centimeters/kilometer = 100,000 centimeters.

Therefore, 1 kilometer is equal to:
a) 1,000 centimeters
b) 1,000,000 millimeters
c) 100 meters.

Choose the answer that matches the desired unit.