Final answer:
The set of numbers in option a) -31, -21, -1, 1935 is the one that is arranged in descending order, from largest to smallest.
Step-by-step explanation:
The student is asking which set of numbers is arranged in descending order. Descending order means that the numbers are arranged from largest to smallest. Let's review the options provided by the student:
- a) -31, -21, -1, 1935
- b) 13.51, -1, -21, 731
- c) 0, -1, -21, 1935
- d) 12, 131, -21, 135
Among these, set a) -31, -21, -1, 1935 is the one that is correctly arranged in descending order. This is because 1935 is the largest number and -31 is the smallest, and all numbers following are in order from largest to smallest.