What is the perimeter of a square with area 16 square cm

Based on what i know about mean, this doesn't add up.

What is the factored form of the following expressions? d^2 – 13d + 36

Sue's average score for three bowling games was 162. in the second game, sue scored 10 less than in the first game. in the third game, she scored 13 less than in the second game. what was her score in the first game?