OG详解-OG2 数学2 Q23

Choice B is correct. Since  1 mile is equal to  1,760  yards,  1 square mile is equal to 1,760² , or 3,097,600, square yards. It’s given that the park has an area of 11,863,808 square yards. Therefore, the park has an area of (11,863,808 square yards) (1 square mile3,097,​600 square yards​ ), or  11,863,808​3,097,600 ​square miles. Thus, the area, in square miles, of the park is  3.83 .
Choice A is incorrect and may result from conceptual or calculation errors. Choice C is incorrect. This is the square root of the area of the park in square yards, not the area of the park in square miles. Choice D is incorrect and may result from converting 11,863,808 yards to miles, rather than converting 11,863,808 square yards to square miles.