Ruby needs a cup of powdered milk and six cups of whole wheat to prepare four batches of pancakes.
Given the <em>quantities</em> of powdered milk and whole wheat to prepare a batch of pancakes, we can determined the <em>total</em> amount of each ingredient by simple rule of three:
Powdered milk
Whole wheat
Ruby needs a cup of powdered milk and six cups of whole wheat to prepare four batches of pancakes.
To learn more on simple rule of three (cross multiplication), we kindly invite to check this verified question: brainly.com/question/8647106