What are the number of possible digits to round 1_9,644 to the nearest 100,000?

4 goes in the blank.

In math, if any number like that is 5 or higher, it rounds to the nearest tenth.

so for example, 4 would round down to 0, and 5 would round up to 10.

So with the 4, it Makes 149.6k, which rounds down to 100,000.

2,3,4 all can go because they around it down

Answer is either b or c