Answer:
9
Explanation:
8.571
The 8 is in the ones place.
First, change all digits after the 8 to 0.
8.000
If the first digit you dropped is from 5 to 9, the last digit you keep goes up by 1. Since the first digit to the right of the 8 is 5, the 8 goes up by 1.
9.000
The answer is 9.