Answer:
The area of a circle can be calculated using the formula:
Area = π x radius^2
where π (pi) is a mathematical constant approximately equal to 3.14159.
Since each rug has a radius of 4 feet, the area of one rug is:
Area = π x 4^2
Area = 16π square feet
To find the total area covered by the three rugs, we need to multiply the area of one rug by three:
Total area = 16π square feet x 3
Total area = 48π square feet
Using a calculator, we can approximate the value of π to two decimal places as 3.14, so the total area covered by the three rugs is:
Total area ≈ 48 x 3.14 square feet
Total area ≈ 150.72 square feet
Therefore, Joanna's bedroom floor will be covered by approximately 150.72 square feet of rugs.