Answer:
OD = 9.375"
Step-by-step 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:

1 hour=3600 seconds
8 times 3600 =28800
The total cost would be $4,050. Hope this helps!
Area = Length x Height
Area = 5.4 x 5.4
Area = 29.16
Youre gonna have to upload a picture of the porch, "figure below"