When a nonzero rational and an irrational number are multiplied, is the product rational or irrational?

If m 17 27 90 63 ** picture is attached

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)

If a suspect is in possession of 20 grams of cocaine how many ounces does he possess what will the charge be