Answer:
B. 4 ft
Step-by-step explanation:
First, find the width of the wall.
The length, width, and diagonal form a right triangle, where the diagonal is the hypotenuse and the length and width are the 2 legs.
Use the pythagorean theorem and solve for a, the width of the wall.
a² + b² = c²
a² + 16² = 20²
a² + 256 = 400
a² = 144
a = 12
So, the width of the wall is 12 feet.
Solve for the width of the mural. Again, the diagonal, length, and width form a right triangle.
Use the pythagorean theorem again and solve for a, the width of the mural:
a² + b² = c²
a² + 6² = 10²
a² + 36 = 100
a² = 64
a = 8
So, the width of the mural is 8 feet.
Now, find the difference between the widths of the wall and mural:
12 - 8
= 4
So, the difference between the two widths is B. 4 ft
