Respuesta :
Answer:
20 days
Step-by-step explanation:
We multiply 25 by 4 to get 100, then multiply 5 by 4 to get 20.
Answer: 20 days
Explanation: 25/5 =5 so they are selling 5 books a day. So to get to 100, do 100/5 which equals 20
Explanation: 25/5 =5 so they are selling 5 books a day. So to get to 100, do 100/5 which equals 20