15'x37'x4" requires 6.85 cubic yards.
28
You will need 27.6 cubic yards of cement.
Thickness? Do you mean cement or concrete - cement is the binder/adhesive in the concrete.
3.95 cubic yards of cement are needed for a slab that size.
14.81 cubic yards.
0.86 cubic yards is needed.
A minimum of 5.93 cubic yards is needed.
25
18.52 cubic yards are needed.
1.85 cubic yards of cement.
8.64 cubic yards of cement.
1.5 cubic yards of cement are needed for an 11' x 11' x 4" slab.