In the figure below, ac is tangent to circle b. ba is a radius of circle b and a is a point of tangency. if ab is equal to 85 and ac is equal to 110, what is the approximate measure of segment bc?

a.138
b.137
c. 136
d.139

Which statements regarding the diagram are true? check all that apply.

Polynomial that can be factored as (3x-4)(3x+4)

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.