Anyone able to help with this?

Jordan got 27 out of 90 correct on his test . what fraction of the marks did her get correct

If you have 12 feet of string and you cut it into equal length of 5 inches each how much string will be left

36x2 + 49y2 = 1,764 the foci are located at: (-√13, 0) and (√13,0) (0, -√13) and (0,√13) (-1, 0) and (1, 0)edit: the answer is (- the square root of 13, 0) and (the square root of 13, 0)