What is 389,422 rounded to the nearest hundred thousand

400,000

Step-by-step explanation:

We have the number 389,422 first we need to indentify the hundred thousand position:

389,422

The hundred thousand position is 3. To round we have to looj tho the right position we are trying to round in this case is 8. If the digit to the right is less than  5  we keep the digit we are rounding to the same and eliminate all the digits to the right, making them  0.  If the digit to the right is greater than or equal to  5  we add 1 to the digit you are rounding to and eliminate all the digits to the right, making them  0 .

Then the answer is:

answer is because 4×10=40

and 98×4= is 392

40,392

the answer to this is a. a^2 + b^2 = c^2