Answer:
Vol = 514.5
= 514 1/2 yd^3
from your answer list:
five hundred fourteen and one-half yd3
Explanation:
A rectangular prism is irl, just a box.
The volume is length×width×height.
All those measurements are given.
Let's use 12.25 instead of 12 1/4. These are equal.
V = 12.25 × 6 × 7
= 514.5
The .5 in the answer is the 1/2 in the list of answers.
Vol = 514 1/2yd^3