Lisa adds 2 tsp baking soda to 6 lbs. of flour. How much baking soda should she add to 9 lbs. of flour?

Question

Options:
3 tsp
18 tsp
27 tsp
9 tsp

Answer 1

To determine the amount of baking soda Lisa should add to 9 lbs. of flour, we can use the ratio of baking soda to flour.

The ratio of baking soda to flour is 2 tsp / 6 lbs. We can simplify this ratio by dividing both the numerator and denominator by 2:

1 tsp / 3 lbs.

Now, we can set up a proportion to find the amount of baking soda Lisa should add to 9 lbs. of flour:

1 tsp / 3 lbs. = x tsp / 9 lbs.

To solve for x, we can cross multiply:

1 * 9 = 3 * x

9 = 3x

Divide both sides by 3:

9 / 3 = x
3 = x

Therefore, Lisa should add 3 tsp of baking soda to 9 lbs. of flour. Thus, the correct option is 3 tsp.