Find the greatest common factor of 8a and 6a? ​

In which source of water would a wave travel the fastest? o ice o cold o room temperature o hot mark this and return save and exit next

Your friend swims on the school team. in his first four races, his times are 24.7, 23.5, 25.6, and 27.2 seconds. which time listed for his next race would make the range larger?

Me with this one question, and i'll upvote the brainliest answer