I'm relatively sure that it is 9 but idk rly. Hope this helps!
Step-by-step explanation:
DC = DF + FE + EC = 3 + 14 +6 = 23 in 
Area of trapezoid ABCD

You have to do the integers first. 5 to the 7th power is 78,125. 5 to the 3rd power is 75. Now you have to divide 78,125 by 5. It would be 15,625. Now you have to multiply 15,625 by 75 to get 1,171,865.
Answer:
192in
Step-by-step explanation: