Two plane mirror are inclined to each other at angle 60°. A ray of light is reflected first at one mirror and then at the other. What is the total deviation of the ray?

Which of the following is a direct benefit of the use of assembly lines in production a. laws against theft fraud and coercion are needed to protect free choice. b. the government needs to plan efficient outcomes. c. competition among producers by itself cannot ensure a wide range of consumer choices. d. works pressure the government to guarantee minimum wages