What is the area of this figure?

Answer:
through lengthy mafs, your answer should be 307 mi (wrong somehow)
Step-by-step explanation:
if you want an explanation, please, dont be afraid to comment ;)
(to other people who look this up the answer is actually 318 i dont know, but i got it wrong
Answer:
318 mi
Step-by-step explanation:
Hope it helps! Sorry couldn't do the explanation bc i am really busy, but its the right answer.