The answer is $24.41
Step 1. Calculate the area of the circular piece of fabric.
Step 2. Multiply the area of the piece by the price of $5.40 per ft² to get the total cost.
Step 1.
The area (A) of the circle with radius r is:
A = π r²
π = 3.14
r = 1.2 ft
A = 3.14 * (1.2 ft)²
A = 3.14 * 1.44 ft²
A = 4.52 ft²
Step 2.
Make a proportion
1 ft² costs $5.40
4.52 ft² cost x
1 ft² : $5.40 = 4.52 ft² : x
x = 4.52 ft² * $5.40 / 1 ft²
x = $24.41
