7. Kataya wants to paint the outside of her house. The perimeter of the house is 160 feet and the height is nine feet. To know how much paint to buy she needs to calculate the surface area. What is the actual surface area of the house?

To find the surface area of the outside of Kataya's house, we need to calculate the area of the walls. Since the house is a rectangular shape, the area of the walls can be calculated using the formula: Surface Area = Perimeter × Height. With a perimeter of 160 feet and a height of 9 feet, we have: 160 ft × 9 ft = 1440 square feet. So, the actual surface area of the house is 1440 square feet. Assuming Kataya is planning to paint her walls in one color, she should also consider the details of the area that won't need paint, like windows and doors. By measuring these additional features and subtracting their area from the total surface area, she can determine how much paint to purchase, avoiding overspending. Plus, it's always a good idea to purchase a little extra in case of second coats or unexpected touch-ups!