Two islands are in the ocean. if the central angle with vertex at the center of the earth and rays that pass through these two islands measures 12’, how many statute miles apart are they?

Gravel is being dumped from a conveyor belt at a rate of 25 ft3/min, and its coarseness is such that it forms a pile in the shape of a cone whose base diameter and height are always equal. how fast is the height of the pile increasing when the pile is 14 ft high? (round your answer to two decimal places.) ft/min