Answer:
What you got right:
0.5 - Possible
48 - Possible
-6 - Not possible
0 - Not possible
BUT....
3 is possible
Explanation:
When we want to know the side lengths of a rectangle and we have possible choices, we want to look at if it's in the realm of possibility. That is, if it's physically possible. You have 5/6 correct, so I think you've done a good job so far. But what you got wrong was the statement that 3 is not possible.
3 is possible, because 24 is divisible by 3. The length would then be 8. So, what you should have put is that 3 is Possible.
(my comment on someone else's answer is incorrect, you only got one wrong, my bad)