Answer:
Therefore, Eleanor uses 500 ml of lemon juice to make 900 ml of the salad dressing.
Explanation:
To find out how much lemon juice Eleanor uses in the salad dressing, we need to determine the ratio of lemon juice to the total mixture and then calculate the amount based on the given ratio and the total amount of salad dressing. The ratio of lemon juice to oil is given as 5:4, which means that for every 5 parts of lemon juice, there are 4 parts of oil. To find the total number of parts in the mixture, we add the two parts together: 5 + 4 = 9. Next, we can calculate the amount of lemon juice Eleanor uses by dividing the total amount of salad dressing (900 ml) into 9 equal parts and then multiplying that value by the number of parts corresponding to lemon juice (5 parts out of 9). 900 ml / 9 = 100 ml per part Now, to find the amount of lemon juice, we multiply the amount per part (100 ml) by the number of parts corresponding to lemon juice (5 parts): 100 ml/part * 5 parts = 500 ml.