To determine how much baking soda is needed for a full sheet cake, let's break down the problem step-by-step.
1. We know that each [tex]\(\frac{1}{4}\)[/tex] sheet of cake requires 0.75 teaspoons of baking soda.
2. A full sheet cake is composed of 4 quarters.
3. To find the amount of baking soda required for a full sheet cake, we multiply the amount needed for one [tex]\(\frac{1}{4}\)[/tex] sheet by 4 (since there are 4 quarters in a full sheet).
[tex]\[
\text{Amount of baking soda for full sheet cake} = 4 \times 0.75 \text{ tsp}
\][/tex]
4. Performing the multiplication:
[tex]\[
4 \times 0.75 = 3 \text{ tsp}
\][/tex]
Therefore, the amount of baking soda needed for a full sheet cake is 3 teaspoons.
The correct choice is (C) 3 tsp.
