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a circular swimming pool is 22 feet across. how many square feet of material cover the bottom of the pool?

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irspow
Area of a circle is pr^2, or when using d as r=d/2 is (pd^2)/4.  It says that the pool is 22 feet across so that means the diameter of the pool is 22 ft so

A=(p*22^2)/4

A=484p/4

A=121p ft^2

A≈380.13 ft^2
The formula for the area of a circle is A=(pi)r^2. The diameter of a circle is how far across it is, and r is the radius and exactly half of the diameter. The radius is 11 feet. All you have to do at that point is plug the numbers into the equation. You will need 380.13 square feet of material to cover the bottom of the pool.

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