Proof #2 1. space space open parentheses there exists y close parentheses space open parentheses T y space times space B y close parentheses 2. space space open parentheses y close parentheses space open parentheses T y space superset of space F y close parentheses space space space space space space divided by space space space open parentheses there exists y close parentheses space open parentheses B y space times space F y close parentheses

Scale factor of 2 is used to enlarge a figure as shown below the area of is 18 in.²

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.

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)