Question

Someone smart please help and get it right offering 100 points

Answer 1

2.8

Explanation:

By the angle bisector theorem,
`(AC)/(AB)=(CD)/(DB).` Plugging in the values from the diagram gives:

`(5.8)/(5.5)=(3)/(?).`

Solving gives

`?=(3\cdot 5.5)/5.8\\\approx 2.8`