Scaling
Each centimeter on the map represents 30 miles in Learner County.
The town of Presley and Mt. Samerone are separated by a horizontal distance of 8 centimeters,
If we only consider the horizontal component of the distance, then both points are separated by 8 * 30 = 240 miles.
Since there is not an option for this number, we choose the closest, considering they are including a smaller vertical distance in the calculations, thus the answer is:
A. 270 miles