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Answer :

He earns $.40 per book.
Akaiqbacongo

Answer:

1 to 4

Step-by-step explanation:

Given function:

  • 10 to 40
  • 20 to 80

as you can see, everytime it goes up, it multiply by 4...this means that 1 dollar=4 phone book...

Divide both digit by highest factor:

  • [tex]10*10=1[/tex]
  • [tex]40*10=4[/tex]  

Therefore, for every dollar, Sammy can get 4 phone books.

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