Find a_n if n=4, of the arithmetic sequence with a_n=3n+1

Can someone check my answer? you

Hi if you want to play a sports related kahoot go to kahoot.it and type in this code: 659344

Madeline takes her family on a boat ride. going through york canal, she drives 6 miles in 10 minutes. later on as she crosses stover lake, she drives 30 minutes at the same average speed. which statement about the distances is true?