How aliens helped Devin using proportion

Two days before the school dance a guy named Devin had to finish his homework to go to it but just when he got stuck on 3 promblems he needed help and he didnt know what to do but just when he was about to give up. A space ship comes from the sky and an alien comes out.Then just when Devin goes outside the alien sayed ''Theres no more oil in the ship will you help me'' and Devin sayed ''sure I will help you but you got too help me with 3 promblems'' the alien sayed ok.

1.What is the ratio of red tiles to titles?Explain your answer in 3 different ways

Answers:part to whole, 4:21

2.Deila was paid $35 for 5 h of babysitting.How much will she recieve in 3 hours?Use unit rate to find your answer.

Answer:she would recieve $21 for 3 hours

3.David can saw a log into three pieces in 7 minutes.If he continues sawing at a constant rate,
how long will it take him to saw a similar log into six pieces?

Answer:David will take 13.8 minutes for 6 pieces.

After Devin gets the answers from the alien the alien for some reason died because he couldnt handle the earths air.