Lisa adds 2 tsp baking soda to 6 lbs. of flour. How much baking soda should she add to 9 lbs. of flour?
A: 3 tsp
B: 27 tsp
C: 9 tsp
D: 18 tsp
We can set up a proportion to solve this problem. Let's represent the amount of baking soda with "x".
We have the ratio of baking soda to flour as 2 tsp/6 lbs. = x tsp/9 lbs.
Cross-multiplying, we get 6x = 2 * 9.
Simplifying, we have 6x = 18.
Dividing both sides by 6, we find that x = 3.
Therefore, Lisa should add 3 tsp of baking soda to 9 lbs. of flour.
So, the answer is A: 3 tsp.
To solve this problem, we can set up a proportion based on the ratio of baking soda to flour.
We know that Lisa added 2 tsp of baking soda to 6 lbs of flour. We can express this as the ratio of baking soda to flour:
2 tsp / 6 lbs
Now, we need to find out how much baking soda Lisa should add to 9 lbs of flour. Let's represent this unknown amount as "x" tsp of baking soda. The ratio for the second scenario would be:
x tsp / 9 lbs
Setting up a proportion, we have:
2 tsp / 6 lbs = x tsp / 9 lbs
To solve for "x," we can cross-multiply and solve the equation:
6 lbs * x tsp = 9 lbs * 2 tsp
6x = 18
Dividing both sides by 6:
x = 3
Therefore, Lisa should add 3 tsp of baking soda to 9 lbs of flour. So the correct answer is A: 3 tsp.
To find out how much baking soda Lisa should add to 9 lbs. of flour, we can set up a proportion using the ratio of baking soda to flour.
Since Lisa added 2 tsp of baking soda to 6 lbs. of flour, we can set up the following proportion:
2 tsp / 6 lbs. of flour = x tsp / 9 lbs. of flour
To solve for x, we cross multiply:
2 tsp * 9 lbs. of flour = 6 lbs. of flour * x tsp
18 tsp = 6 lbs. of flour * x tsp
Dividing both sides of the equation by 6 lbs. of flour, we find:
18 tsp / 6 lbs. of flour = x tsp
x = 3 tsp
Therefore, Lisa should add 3 tsp of baking soda to 9 lbs. of flour.
So the correct answer is: A) 3 tsp.