What is 150 mm expressed in decimeters?
a. 1500 dm
b. 15 dm
c. 1.5 dm
d. 0.15 dm

The answer is C. 1.5dm
Explanation:
Use the "King Henry Died Monday Drinking Chocolate Milk" to remember the scale which is "Kilo, Hecto, Deca, Meters, Deci, Centi, Milli"
This goes from the largest--kilo--to the smallest--milli.
We have 150 millimeters, so you start at "milli" to get to decimeters, you jump 2 spaces up the scale, so you take the decimal point and move it two spaces up the number and get 1.50 decimeters

The correct answer is 1.5. I hope this answer will be helpful! Thank. U