Final answer:
If a cookie recipe requires 2(1/2) cups of sugar for every cup of flour, then using 1 cup of flour would require 2(1/2) cups of sugar.
Step-by-step explanation:
The question asks how many cups of sugar are needed if a cookie recipe calls for 2(1/2) cups of sugar for every cup of flour, and you are using 1 cup of flour. To find the answer, you multiply the amount of flour by the ratio of sugar to flour given in the recipe. In this case, that's 1 cup of flour × 2(1/2) cups of sugar/cup of flour, which equals 2(1/2) cups of sugar. So, you would need 2(1/2) cups of sugar for 1 cup of flour.