7 copies I assume means multiplication. 7 x 1/4=7/4. When multiplying fractions, the numerator is multiplied.
1=1.19m, 2=232.35ft2, 3=916.09cm2, 4=3.375km, 5=3.54ft, 6=67.02mm3, 7=13ft....
i hope you find these answers useful
The volume formula of a square pyramid is
V = 1/3 Bh (B is base).
Base area = 13 • 13
Base area = 169
Height = 11 m
Plug that in for:
V = 1/3 (169)(11)
V ≈ 619.66 or rounded is 619.67 cubic meters