Tami is building a wooden deck. The deck needs 25 pieces of wood and each piece of wood needs 4 screws. If Tami already has 20 screws, how many more screws does she need to buy?

Ahmed plans to add a rectangular sunroom to his house. the sunroom will have a length of 14 feet and a width of 10 feet, and the construction will cost $40 per square foot. how much more would the sunroom cost if it’s width were increased to 12 feet?