5. If Khalid writes the word “Hello,” what sequence of numbers does he press?
______Hello : 443355555666_______________________________
After Khalid presses the numbered keys, the microchip within his cell phone must decide what letters to show on the screen. Consider the relation from number to letter.
6. What is the domain of this relation?
_____________________________________
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zjskßkßkßkkkßkßkßkßkßkßkßkßkßkskßkßkkßkßkßkskkskskßkßkkß
ßjßkßks
su
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