Answer:
3)40 decimeter = 4 meters
6)Jacob is incorrect because 7 kilometer does not equal 700 meters. The right answer would have been 7000 meters.
7)2 decimeters > 10 centimeters
8) 30 centimeters = 3 decimeters
9) 6 kilometers > 5,000 meters
10)8 meters < 90 decimeters
Hope this helped :)