Answer: the 1st one.
Step-by-step explanation: becuase today I was helping out a freind with this. So it the first one
Millimeter centimeter meter kilometer
The answer is a Rational Number
explanation:
(A) 
Answer option C) 8, 12, 6, 1
B) 
Answer option D) 16, 96, 216, 216, 81
C) 
Answer option B) 27, 54, 36, 8
D)
Answer option A) 1, 4, 6, 4, 1
Answer:

And after operate we got:

So then the gragbe per capita on this was would be 
Step-by-step explanation:
For this case we know the following info:
Total waste generated for a certain country in 2005 : 
Total population for this country in 2005 
And we want to estimate the garbage per capita or per person for 2005, and we can use the following formula:

And after operate we got:

So then the gragbe per capita on this was would be 