Find the coordinates of points that are in the second quadrant and 5 units away from (0, 0). I already have (-3, 4) (-4, 3) (-2, sqrt21) (-sqrt21, 2). I need one more

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches.approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *