Solve 86.5=2l+2(2l-40.75)

Carter drank 15.75 gallons of water in 4 weeks. he drank the same amount of water each day.a. estimate how many gallons he drank in one day.b. estimate how many gallons he drank in one week.c. about how many days altogether will it take him to drink 20 gallons?

If you could answer these your a life saver

What is the similarity ratio of a cube with volume 729m^3 to a cube with volume 3375 m^3