Answer :
Final answer:
To find out how much sugar is required for 1 cup of lemon juice, we simply double the amount required for 1/2 cup since 1 cup is twice the amount of 1/2 cup. This gives us 7 tablespoons of sugar.
Explanation:
The problem is asking to determine the amount of sugar required (in tablespoons) for 1 cup of lemon juice, given that the recipe calls for 3½ tablespoons of sugar for every 1/2 cup of lemon juice.
To solve this, we need to set up a proportion to find out how many tablespoons of sugar are required for 1 cup of lemon juice.
Since 1 cup is twice the amount of 1/2 cup, we can simply double the amount of sugar required for 1/2 cup to find out how much is needed for 1 cup.
In this case, doubling 3½ tablespoons of sugar gives us 7 tablespoons.
Therefore, Joanna should use 7 tablespoons of sugar for 1 cup of lemon juice.
Learn more about Proportions here:
https://brainly.com/question/34018947
#SPJ11