At a local high school, gpa's are normally distributed with a mean of 2. 9 and standard deviation of 0. 6. What percentage of students at the high school have a gpa between 2. 3 and 3. 5?.

Which of the following would be considered a nec code violation in regards to the installation of luminaires? a. an outdoor lighting fixture mounted to a tree b. a five-pound, 12-inch diameter light fixture supported by the screw shell of the lampholder c. florescent lay-in fixtures attached to the framing sections of a suspended ceiling with sheet-metal screws d. track lighting over a sink, 2 feet from a bathtub