Final answer:
Karla can arrange the 6 questions in her survey in 720 unique ways, using permutations calculated as 6 factorial (6!).
Step-by-step explanation:
Karla wants to find out how many unique ways there are to arrange 6 questions in her survey. The answer to this can be found by calculating the number sequence's permutations, which is the number of ways to arrange a set of items where the order does matter. Since there are 6 questions, we need to find the value of 6 factorial (6!).
6 factorial is calculated as:
This multiplication gives us 720, so there are 720 unique ways to arrange the 6 questions.