The volume of a cylinder can be calculated as π * radius^2 * height. In this case, the radius is 0.5 ft and the height is 25 ft, so the volume is:
π * 0.5^2 * 25 = 19.63 cubic feet
So the cost of the utility pole would be 19.63 * $25.81 = $509.24
Rounding to the nearest cent, the cost of the utility pole would be $509.24, which can be rounded to $509.00.