9514 1404 393
Answer:
any digit will make the sentence true
Step-by-step explanation:
Using 'd' to represent the digit, the sentence can be rewritten ...
4571.109 +0.01d ≤ 4571.1997
Subtracting the constant on the left gives ...
0.01d ≤ 0.0907
d ≤ 9.07
Every single digit is less than 9.07, so any digit will do. (There are 10 right answers.)
