Write a prototype and prototype comments for the sqrt library function.
What will be an ideal response?
```
//precondition: argument >= 0
//postcondition: return_value * return_value == argument
double sqrt( double parm);
```
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A mask layer hides the contents of the layer below it, called the invisible layer.
Answer the following statement true (T) or false (F)
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A. lists B. files C. templates D. packages
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A. Restart the computer. B. Edit the registry. C. Uninstall and reinstall the software. D. Restart the software.