Ateacher needs 70 lengths of string cut to 40cm each. if balls of string are 10m long, how many balls will be needed?

Can someone me out here and the tell me the greatest common factor

You are at a restaurant and owe $56.20 for your meal. you want to leave an 18% tip. approximately how much is your tip?

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?