Determine if line ab is tangent to the circle.

7) No

8) Yes

Step-by-step explanation:

Tangent lines are perpendicular to the radius lines at the point of intersection.  So we just need to check if these are right triangles.

7) c² = a² + b²

20² = 12² + 14²

400 = 340

No

8) c² = a² + b²

13² = 7.8² + 10.4²

169 = 169

Yes

step-by-step explanation:

the options are kind of confusing. i can tell you what i see going on here when i look at the graph.

the class and exam medians are closely related, and it looks like the low outlier on the exam did pull the median lower. [tex][/tex]