Sadie weights out 690 grams of flour. Using the rate from Q4, how many cups did she weigh
The Correct Answer and Explanation is:
To determine how many cups Sadie weighed out from 690 grams of flour, we need the rate from Q4. Assuming the rate from Q4 is:
1 cup of flour = 120 grams
We use this conversion factor to calculate the number of cups:Number of cups=690 grams120 grams per cup=5.75 cups\text{Number of cups} = \frac{690 \text{ grams}}{120 \text{ grams per cup}} = 5.75 \text{ cups}Number of cups=120 grams per cup690 grams=5.75 cups
Final Answer: 5.75 cups
Explanation
To solve this problem, we are asked to convert grams of flour into cups using a known rate. The key to solving any unit conversion problem is to use a conversion factor, which tells us how many units of one measurement are equivalent to another. In this case, we are given that one cup of flour weighs 120 grams. This allows us to relate the two measurements — grams and cups.
Sadie measured out 690 grams of flour. Since we want to find out how many cups this amount represents, we divide the total grams by the number of grams per cup. That is:690 grams120 grams per cup=5.75 cups\frac{690 \text{ grams}}{120 \text{ grams per cup}} = 5.75 \text{ cups}120 grams per cup690 grams=5.75 cups
This calculation tells us that 690 grams of flour is equal to 5.75 cups of flour. The result makes sense because 690 is a little less than 6 times 120. If she had used 720 grams, that would have been exactly 6 cups since 6×120=7206 \times 120 = 7206×120=720. But since she used 690 grams — which is 30 grams less — she ended up with 0.25 cups less than 6. That is why the answer is 5.75 cups.
Understanding unit conversions is important not just in cooking or baking, but in many areas of science and everyday life. It helps ensure accuracy and consistency, especially when different units are used. This problem shows how knowing a simple rate or ratio allows you to convert from one unit to another in a straightforward way.
