Answer please i will give 10 points and mark brainiest

Answer: 320 , 112, 432
Step-by-step explanation:
Volume of Rectangular Prism= 4 * 8 * 10
= 32*10
= 320 ft cubed
Volume of triangular prism= 4 * 7 * 8
= 28 * 8
= 224
= 224 divided by 2
= 112
Volume of composite= 112 + 320
= 432