Respuesta :

11. 28*21 = 588 cubic feet

12. 16*9/3 = 48 pi ~150.72 ~ 151 cubic inches

13. 9*9*14/3 =  378 cubic yards
GonJun

Answer:

11. 28*21 = 588 cubic feet

12. 16*9/3 = 48 pi ~150.72 ~ 151 cubic inches

13. 9*9*14/3 = 378 cubic yards

Step-by-step explanation: