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(Level 3) 1. Qing attached a dog ramp to her bed, which allows her dog to easily climb onto the mattress. The ramp is 48 inches long. The base of the ramp is 40 inches from the base of the bed. How high off the ground is the top of the mattress? Round your answer to the nearest tenth. Answer:(Level 3) 2. The general form of a circle is given as o' +y +4x-12y+4 =0 (a) What are the coordinates of the center of the circle? (b) What is the length of the radius of the circle? Answer.(Level 4) 3. A 10-foot ladder placed on level ground leans against the side of a house. The ladder reaches a point that is 9.2 feet up on the side of the house. (a) What is the measure of the angle formed by the ladder and the level ground? Round your answer to the nearest degree. Show your work. (b) The Occupational Safety and Health Administration (OSHA) sets standards for a variety of occupations to help prevent accidents and other safety hazards. OSHA's standard for the angle formed by a ladder and level ground is 75". The same 10-foot long ladder is placed against the building according to OSHA's safety standard. What is the distance between the foot of the ladder and the foot of the building? Round your answer to the nearest tenth. Show your work.