Volume = 873 - 50 = 723 cm^3
Four regions of the electromagnetic spectrum that astronomers use when observing objects in the space are the following enumerated answers.
1. First is Ultraviolet
2. Next is Infrared
3. Then the radio
4. Lastly the Visible lights.
These are the answers to the problem.
Downwards - from uphill towards the lowlands and eventually into the sea.
Answer:
it's because some versions have more steps and others have less