A rug needs to be placed inside of an empty living room. The rug is shaped like a square and has the same dimensions on each side. The area of the rug is 16 2 + 8 + 1 . The length of the room is twice the length of the rug and increased by 6. The width of the room is three times larger than the width of the rug. What is the total amount of empty space between the rug and the wall?

3.17 scores on stats final. below are final exam scores of 20 introductory statistics students. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 57, 66, 69, 71, 72, 73, 74, 77, 78, 78, 79, 79, 81, 81, 82, 83, 83, 88, 89, 94 (a) the mean score is 77.7 points. with a standard deviation of 8.44 points. use this information to determine if the scores approximately follow the 68-95-99.7% rule. (b) do these data appear to follow a normal distribution? explain your reasoning using the graphs provided below.