Final answer:
Kari uses 2.5 cups of flour for each batch of cookies.
Step-by-step explanation:
To find out how many cups of flour Kari uses for each batch, we divide the total number of cups of flour by the number of batches she makes.
Given that Kari uses 15 cups of flour to bake 6 batches of cookies, we can set up a proportion:
15 cups / 6 batches = x cups / 1 batch
To solve for x, we can cross-multiply and divide:
x = (15 cups * 1 batch) / 6 batches
x = 2.5 cups
Therefore, Kari uses 2.5 cups of flour for each batch of cookies.