there are 16 tablespoons in 1 cup and 3 teaspoons in 1 tablespoon. a recipe calls for 1/2 cup of sugar, but Ali only has a teaspoon to measure her ingredients

To measure out 1/2 cup of sugar using a teaspoon, Ali will need to use the conversion factors given.

1/2 cup = 8 tablespoons
8 tablespoons = 8 * 3 = 24 teaspoons

Therefore, Ali will need to measure out 24 teaspoons of sugar to make 1/2 cup.