Gawdmuhfuhndayum this class boring

In numbering carbon atoms in the parent chain of a hydrocarbon, why would you number from right to left, rather than left to right

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

Which of the following would be an accurate picture of the earth during the summer time of the northern hemisphere?