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A circular railroad-crossing sign has a diameter of 30 inches.
Which measurement is closest to the area of the sign in square inches?
The area of a circle can be calculated using the formula A = πr^2, where r is the radius of the circle.
Since the sign has a diameter of 30 inches, the radius would be half of that, which is 15 inches.
Plugging the radius into the formula:
A = π(15)^2
A = π(225)
A ≈ 706.86 square inches
Therefore, the closest measurement to the area of the sign in square inches is 706.86.