You respond to a house fire with the local fire department. they bring a 48-year-old woman out of the house. she is unconscious but her airway is open. her breathing is shallow at 30 breaths/min. her pulse is 110 beats/min, strong and regular. her blood pressure is 108/72 mm hg. she has been burned over 40% of her body. the burned area appears to be dry and leathery. it looks charred and has pieces of fabric embedded in the flesh. you know that this type of burn is considered a: