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How to use the Keypad:

  • Press the button that is the SOLUTION to the question bellow

  • The PIN is FOUR numbers

  • If you input the wrong number the code resets

  • BE CAREFUL! The questions COULD change

  • Once all FOUR correct numbers are entered you will gain entrance to the building

  • RESET starts the PIN over

CLUE TO THE BUTTON:

What is the domain of the following function: 

{(1,10), (1,5), (4,7), (4,6), (7,1), (7,0), (9,5)}

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The PIN is the Domain in ascending order. 

 1   4    7      

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