Which of the following methods of applications of dry-chemical extinguishing systems discharges agent onto a specific surface such as the cooking area in a restaurant kitchen?

Each of the following statements regarding the fundamentals of periapical radiographs is correct EXCEPT one. Which one is the EXCEPTION?

a. Periapical radiographs may be taken using the paralleling or bisecting technique. b. Placement of the image receptor-holding device must be evaluated to avoid angulation errors. c. The patient's finger can be used to hold a large image receptor in position in the oral cavity. d. The size of image receptor chosen depends on the shape and size of the dental arches.

When unfolding a sterile package, which way should the first corner be opened?

away from you to the left towards you to the right