Answer: V ≈ 4309.5 ft³
Step-by-step explanation: To get the answer to this word problem all we have to do is multiply height * thickness * width.
First, let's turn 6 [tex]\frac{1}{2}[/tex] into a decimal...
1 ÷ 2 = 0.5
6 [tex]\frac{1}{2}[/tex] = 6.5
6.5 * 3 * 13 = 253.5
Now, we have to multiply it by the remaining amount of stones...
253.5 * 17 = 4309.5
V ≈ 4309.5
I hope this helps!