Answer:

Step-by-step explanation:
the unit of length is meter,
so, 80cm=0.8cm, 10cm=0.1m
the length of the rail=
=
Answer:
212,217
Step-by-step explanation:
189360+22857 = 212,217
Answer: 49.5
Step-by-step explanation:
Basically what you need to do is:
3000 X 0.04^3
I would give an answer but I don’t have a calculator at the moment, but I hope this helps