Answer: No, it's not possible.
Step-by-step explanation: The reason Terry isn't able to ride all the water slides is because it would take around 8 hours.
You multiply 35 minutes by 14 water slides, since they each take 35 minutes:
35*14= 490 minutes
Then you would divide 490 minutes with the minutes in an hour: 60
490/60= 8.166... hours