This Problem Set is a part of the Lesson 2, Unit 4, Grade 7. A cyclist rode 3.75 miles in 0.3 hours. How fast was she going in miles per hour? At that rate, how long will it take her to go 4.5 miles? A recipe for sparkling grape juice calls for 3/2 quarts of sparkling water and 3/4 quart of grape juice. How much sparkling water would you need to mix with 9 quarts of grape juice?