0.5 + 0.25 + 20.00 = 20.75
5.4 because the 9 bumps it to 5.35.
And the 5 bumps it to 5.4.
Step-by-step explanation:
Volume = lwh
V = 23 x 24 x 8
V = 4416ft^3
Ft - Yd:
4416ft^3 = 163.5556^3 yd
(I'm not actually sure about this as I don't use the imperial system)