Answer:
OD = 9.375"
Explanation:
We can draw a line from O to B to create a triangle.
Then, Triangle ODB and Triangle ACB are similar, so their corresponding side's ratio are similar as well.
Triangle ACB, we can use pythagorean theorem to figure out CB:
AC^2 + CB^2 = AB^2
15^2 + CB^2 = 17^2
225 + CB^2 = 289
CB^2 = 64
CB = 8
Now relating the corresponding sides, we can figure out OD:
![(OD)/(DB)=(AC)/(CB)\\(OD)/(8-3)=(15)/(8)\\(OD)/(5)=(15)/(8)\\8OD=5*15\\OD=(5*15)/(8)\\OD=9.375](https://img.qammunity.org/2020/formulas/mathematics/middle-school/ittuleygbbnv5m2agmysa6lge6deom3cz5.png)