Answer :
Final answer:
In 700 ml of Jack's salad dressing, the amount of oil he uses is 500 ml, as determined by the given 5:2 ratio of oil to mayonnaise in the dressing.
Explanation:
The problem involves the application of ratios. The ratio of oil to mayonnaise is given as 5 : 2. This means for every 7 units (5+2) of the salad dressing, 5 units are oil and 2 units are mayonnaise.
To find how much oil Jack uses in his 700 ml salad dressing, we would first divide 700 ml by 7 (the total units of the ratio) to get the value of each unit. That is, 700 ÷ 7 = 100 ml. Now, since the oil is represented by 5 units, we would multiply the value of one unit by 5. So, the amount of oil Jack uses is 100 ml x 5 = 500 ml.
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