Lisa adds 2 tsp baking soda to 6 lbs. How much baking soda should she add to 9 lbs of flour?
A. 27tsp
B. 9tsp
C. 18tsp
D. 3tsp
To find the amount of baking soda needed for 9 lbs of flour, we can set up a proportion:
2 tsp baking soda / 6 lbs flour = x tsp baking soda / 9 lbs flour
Cross-multiplying, we have:
2 tsp baking soda * 9 lbs flour = 6 lbs flour * x tsp baking soda
18 tsp baking soda = 6 lbs flour * x tsp baking soda
Dividing both sides by 6 lbs flour gives:
18 tsp baking soda / 6 lbs flour = x tsp baking soda
Simplifying, we find:
3 tsp baking soda = x tsp baking soda
Therefore, Lisa should add 3 tsp of baking soda to 9 lbs of flour.
The answer is D. 3tsp.