A blue whale has a length of 28,578 millimeters. What is the length of a blue whale in kilometers? Show your work below by writing the conversion factors you use to solve this question.

Question

Mercury · Answer

we're in mm
typically, you go to the "base" unit (in this case, meters) and then to the final unit

the conversion factors we'll need: 1m = 1000mm and 1km = 1000m

to go from mm to meters, divide by 1000, then to go from m to km, divide by 1000 again