Joanna is making lemonade. The recipe calls for 3½ tablespoons of sugar for every 1/2 cup of lemon juice. How many tablespoons of sugar should Joanna use for 1 cup of lemon juice? (im in middle school pls keep it simple)

How many liters of peroxide should be added to 12 liters of an 8% peroxide solution so that the resulting solution contains 16% peroxide?   original added new amount of peroxide 0.96 liters x 0.96 + x amount of solution 12 liters x 12 + x 0.18 liter 1.14 liters 1.92 liters 2.10 liters