Answer:
Option 4 - 
Step-by-step explanation:
To find : Which set of rational numbers is arranged from least to greatest?
Solution :
The set of rational numbers are

Writing all number in one form,


Now, -1.4<-0.5<0.2<3
From least to greatest the set of natural numbers are

So, 
Therefore, option 4 is correct.
Answer:
19
Step-by-step explanation:
Answer:
D, not B
Step-by-step explanation:
So using Pythagorean Theorem:

Yep, It's not B, But D.
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