College roommates John and Dave were driving home to the same town. John drove 48 mph, and Dave, who left 3 hrs later, drove at 60 mph. How long will it take for Dave to catch up to John?​

The lengths of two sides of a triangle are 9 and 15. what can be said about the length of the third side? a. it must be greater than or equal to 6 and less than 24. b. it must be greater than or equal to 6 and at most 24. c. it must be greater than 6 and less than 24. d. it must be greater than 6 and at most 24.