Answer: 575,000
Step-by-step explanation: To round 575,319 to the nearest thousand, we first find the digit in the rounding place which in this case is the 5 in the thousands place.
Next, we look at the digit to the right of the 5 which is 3.
The rules of rounding tell us that if the digit to the right of the rounding place is less than 5, we round down and if the digit to the right of the rounding place is greater than or equal to 5, we round up.
So in this case, since 3 is less than 5, we round down.
This means that the 5 in the rounding place stays the same and all digits to the right of the 5 become zero.
Therefore, 575,319 rounded to the nearest thousand is 575,000.