Acircular piece of fabric has a radius of 1.2 ft. the fabric sells for $5.40 per ft². what is the total cost of the circular piece of fabric? use 3.14 for pi.
a 6.48
b 20.35
c 24.42
d 40.69

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

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