Find the length of the radius of a circle with an area of 278 square inches. Round to the nearest?

Area of a circle: A = π * r **2 (pi multiplied by the radius squared)
So, you know the area, 278 square inches, 278 = π * r**2
Divide both sides of the equation by π: 278/π = r**2
So r = √(278/π)
Plug that into your calculator: 9.4 inches
Or you could just type your question into Google, but that doesn't tell you how to find it.