Here you are, its that button.
180 meters in 60 seconds is an average speed of 180m/60s = 3 m/s.
Ragged is used correctly in this instance asthe definition of ragged would mean irregular or unkempt. If that's what you're going for, then it would be used correctly.
The answer to this question would be the last choice. The master program that controls the system hardware.
All computers require a software known as the <em>operating system</em> to properly function and allow you to use the computer. This operating system works as a "master program" that manages the computer's processes and memory.
