An airplane is descending to a runaway. at an altitude of 15.2 miles, its horizontal distance to the runaway is 60 miles. find the angle of descent.

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.