10/19= 0.52
The square root of -12 is 3.46
The square root of 100 is 10.
The square root of 16 is 4.
The negative square root of 10 is -3.16.
50% is also known as 5/10 and 1/2. It is 0.50.
The other numbers don’t really have anything I can answer to so I hope this helped a bit.