1. The inscribed angle is half the central angle subtending the same arc, not equal. Thus, statement 1 is false.
2. The sum of the radii is 3 + 2 = 5. Since the distance between the centers (4) is less than the sum of the radii (5) and greater than the difference of the radii (|3-2|=1), the circles intersect at two points. Thus, statement 2 is false.
3. The distance from the center to the line (10) is greater than the radius (7), so the line and the circle do not intersect. Thus, statement 3 is true.
4. The inscribed angle is half the measure of its intercepted arc. Therefore, an inscribed angle of 40° intercepts an arc of 80°. Thus, statement 4 is false.
The correct answer is 3.