Answer:
300K
Explanation:
Given pressure of the system decreased by 10 times which means 
Given the volume of the system increased by 5 times which means 
Given final temperature 
Let the initial temperature be 
We know that PV=nRT
As n and R are constant 



T1=300K
I think it’s C because he would push off of the sled
I think you forgot to post a picture
1. C
2. G
3. A
4. I
5. H
6. D
7. B
8. J
9. E
10. F
Hope I helped!