If a batch of cookies takes 12 minutes to bake, how long will it take to bake 3 batches?

To determine the total time needed to bake 3 batches of cookies when each batch takes 12 minutes, simply multiply the baking time for one batch by the number of batches.

In this case, 12 minutes per batch multiplied by 3 batches equals 36 minutes. This means that the time required to fully bake all three batches consecutively is a straightforward calculation, as the baking process for each batch is not overlapping. Hence, you need the full time for each batch, leading to a total of 36 minutes.

Thus, the correct answer reflects the proper multiplication of the baking time by the number of batches.