Which the following statements about topography is correct? no science, so sorry if the subject says another

Which is these sentences can be deleted from the first paragraph sentence 4 sentence 2 sentence 5 sentence 3

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

What does it mean when the bisecyer of the photosynthesis of the root of 27 equals 3