Needing help with these concepts. Please show the work and be as detailed as possible. Thank you so much in advance!

A recipe for 1 cup of frosting calls for cup of whip cream. If I want to make 1 cups of frosting, how many cups of whip cream do I need?

I need to estimate the cost to paint a 10 foot by 12 foot room. The height of the

walls is 9 feet tall. What is the combined area of the 4 walls? If the paint cost $.85 per

square foot, what will the cost for the paint be?