Final answer:
2.5 teaspoons is approximately equal to 12.3 cubic centimeters.
Step-by-step explanation:
To convert teaspoons to cubic centimeters, we need to know the conversion factor between these two units. One teaspoon is approximately equal to 4.93 milliliters. Since one millilitre is equal to one cubic centimetre, we can say that one teaspoon is approximately equal to 4.93 cubic centimeters. Therefore, 2.5 teaspoons is approximately equal to 2.5 * 4.93 = 12.325 cubic centimeters. Rounding to the nearest tenth, we get 12.3 cubic centimeters.