A local diner prepares orange juice beverage every morning by adding orange juice concentrate to water. The owner has determined that the best beverage mix results when 27 percent of the orange juice beverage is made up of orange juice concentrate. How many liters of water to the nearest full liter should be added to 3 liters of concentrate to create the optimum mixture of orange juice beverage?

The ACT Mathematics Test contains 60 questions to be answered in 60 minutes.  The hardest ACT math questions (the last 10 to 15 questions) fall into two types: advanced concepts and complex questions. Advanced concepts questions cover what you learn in precalculus and trigonometry. FYI: Students that get into Harvard College have an ACT score of 34–36.