Find and combine the volume of the rectangular prisms

Prism 1: length 15, height 20, width 15
Prism 2: length 15, height 20, width 15
Prism 3: length 15, height 20, width 15
Prism 4: length 15, height 20, width 15
Prism 5: length 44, height 20, width 44

To find the combined volume of the rectangular prisms, we first calculate the volume of each prism:

Prism 1: 15 x 20 x 15 = 4500 cubic units
Prism 2: 15 x 20 x 15 = 4500 cubic units
Prism 3: 15 x 20 x 15 = 4500 cubic units
Prism 4: 15 x 20 x 15 = 4500 cubic units
Prism 5: 44 x 20 x 44 = 38720 cubic units

Now, we add the volumes of all the prisms to get the combined volume:

4500 + 4500 + 4500 + 4500 + 38720 = 56220 cubic units

Therefore, the combined volume of all five rectangular prisms is 56220 cubic units.