A tree leans such that it is not perpendicular to the ground. The distance between points A and B is 30 feet, and point A is 20 feet from the center of the bottom of the tree (as shown in the figure). The distance from point A to point C at the top of the tree is 29 ft. The angle of elevation from point A to point C is 47°. To the nearest foot, what is the distance from point B to point C? To the nearest degree, what is the angle of elevation from point B to point C?