Question

Please help me with Part B I will give you points and thanks! Thank you

Answer 1

2.12=2.120 that is the answer

Answer 2

2.120 kg and 2.12 kg are inherently the same, the zero on 2.120 is actually slightly unnecessary (unless a function asks for a certain tenth's or thousands place to be defined). This problem asks you to write an equation representing this information, I believe the easiest way to do this would be

2.120 kg = 2.12 kg