Here is the formula for determining the volume of rectangular prism
[tex]\boxed{V = l \times w \times h}[/tex]
From the question above, we know that
l = 14 yd
w = 5 yd
h = 8 yd
plug in the numbers into the formula
V = l × w × h
V = 14 × 5 × 8
V = 560
The volume is 560 yd³