Answer:
Your answer would be 12
Step-by-step explanation:
Hopefully this helped, if not HMU and I will try my best to get you a better answer! :)
y^2 + 16y + 64 = 0
(y + 8)(y+8) = 0
y + 8 = 0
y = -8
160 feet^2
base x high x 1/2
hope i'm right