Help I don't think I did it right

Can someone check if i did this correct. it’s number 4 if you’re wondering.

You earn a 12% commission for every car you sell. how much is your commission if you sell a $23,000 car?

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?