Final answer:
Option C arranges the numbers correctly from greatest to least: 4.25, 1/2, -4/5, -6.5.
Step-by-step explanation:
The question asks to arrange a given set of numbers from greatest to least. To determine the correct order, we need to compare the values of each number.
- 4.25 is the largest positive number in the sets.
- 1/2 is a positive fraction and is larger than any negative number but smaller than 4.25.
- -4/5 is a negative fraction that is greater than any negative whole number.
- -6.5 is the smallest negative number and therefore the least in the set.
Given these comparisons, option C: 4.25, 1/2, -4/5, -6.5 shows the numbers in the correct order from greatest to least.