Final answer:
Considering only the decimal numbers provided, the correct sequence 'from least to greatest' would be found in list B. However, please note there may have been typographical errors in the original question regarding the use of 'π' and '√' symbols.
Step-by-step explanation:
To answer this problem, we need to first calculate the values that aren't already expressed as decimals. The symbol 'π' is a mathematical constant that is equal to approximately 3.14. The symbol '√' represents the square root of a number, for example '√4' is '2'. Since none of the lists given contain these symbols, it seems like there may have been a typographical error in the question. Therefore, only estimating the order of the numbers provided in the decimal form we have,
- List A: 13,2.1,5.4,17
- List B: 3.14,3.2,6.3,20
- List C: 23,2.6,1.3,30
- List D: 3.14,15,4.1,4.85,30
Using these estimated values, the correct list arranged in order from least to greatest would be list B: 3.14,3.2,6.3,20.
Learn more about Ordering Numbers