ANSWER: I think that the answer is 28.26
Step-by-step explanation:
I did this a while ago. I hope that I helped<3
The boundary line should be solid because it have a 'great/less than or equal to' sign
B is the best strategy. (You mentioned an option D, but it's not shown in your question!!)
Answer:
The second choice 
Step-by-step explanation:
The missing image is attached
We use the section formula:

We substitute
and m=5, n=9

We simplify to get:

This simplifies to:

In decimals we get:
