Which number rounds to 15,700,000 when rounded to the nearest hundred thousand? . a) 15,000,000. b) 15,579,999. c) 15,649,999. d) 15,659, 999

The correct answer is option D. i.e. 15,659,999. Now, this number is closest to the given number i.e. 15,700,000. Becuase when 659 is rounded to the nearest number of hiher value then its value will be 700. Thus,15,659, 999 rounds to 15,700,000 when rounded to the nearest hundred thousand.