A garage door is 15 feet wide and 6 feet high. It is painted white, except for a rectangular panel 1 foot high an 9 feet wide that is brown. How much of the gatage door is white?

15 * 6 = 90 square feet

1 * 9 = 9 square feet is brown

90 - 9 = _______ square feet is white

To find out how much of the garage door is white, we need to first calculate the area of the whole garage door and then subtract the area of the brown rectangular panel.

The area of the garage door can be calculated by multiplying its width by its height.
Area of the garage door = width × height = 15 ft × 6 ft = 90 square ft.

Similarly, the area of the brown rectangular panel can be calculated by multiplying its width by its height.
Area of the brown panel = width × height = 9 ft × 1 ft = 9 square ft.

To find the area of the white portion, we need to subtract the area of the brown panel from the area of the whole garage door.
Area of the white portion = Area of the garage door - Area of the brown panel = 90 square ft - 9 square ft = 81 square ft.

Therefore, 81 square feet of the garage door is white.

To find out how much of the garage door is white, we need to calculate the area of the white portion and compare it to the total area of the garage door.

The total area of the garage door can be calculated by multiplying its width by its height. In this case, the garage door is 15 feet wide and 6 feet high, so the total area is 15 feet * 6 feet = 90 square feet.

To find the area of the brown rectangular panel, we multiply its height by its width. Since the rectangular panel is 1 foot high and 9 feet wide, the area of the brown panel is 1 foot * 9 feet = 9 square feet.

To find the area of the white portion, we subtract the area of the brown panel from the total area of the garage door. In this case, it is 90 square feet - 9 square feet = 81 square feet.

Therefore, 81 square feet of the garage door is white.