What is the net wall area if the wall is 10' tall and 30' wide but has a window 36" by 42"?

To calculate the net wall area, first determine the total area of the wall. The wall is 10 feet tall and 30 feet wide, so the total area is calculated by multiplying these two dimensions:

Total Wall Area = Height x Width = 10 ft x 30 ft = 300 ft².

Next, account for the window's area, which needs to be subtracted from the total wall area to find the net wall area. The window's dimensions are given as 36 inches by 42 inches. First, we convert these dimensions into feet:

36 inches = 3 feet

42 inches = 3.5 feet

Now, calculate the area of the window:

Window Area = Height x Width = 3 ft x 3.5 ft = 10.5 ft².

Now, subtract the window area from the total wall area to obtain the net wall area:

Net Wall Area = Total Wall Area - Window Area = 300 ft² - 10.5 ft² = 289.5 ft².

Thus, the net wall area is indeed 289.5 ft², which corresponds to the correct choice. This calculation highlights the process of determining the net area by considering both the overall dimensions of the