Lina is covering a wall in her attic with wallpaper. the wall is trapezoid-shaped with top and bottom bases of 14 feet and 20 feet. the height of the wall is 8 feet. how much wallpaper will she need to cover the wall?

We are tasked to solve for the area of the trapezoid-shaped attic and the formula that we can use is shown below:
Area = ((a+b)/2)*h where "a and b" is for the base and "h" is for the height

We have the given values:
a=14 feet
b=20 feet
h=8 feet

Solving for the area:
Area =(14+20)/2 *8
Area = 136 feet²

The answer is 136 feet².