Respuesta :

Autum12

Answer:

394.2 ft

Step-by-step explanation:

7.8(9) = 70.2  This is the measurement for the two triagular sides

9(12)(3) = 324  This is the measurement for the three rectangular sides

70.2 + 324 = 394.2  Aprox.

I am REALLY sorry if this is wrong...
I think it’s 394.2??