The result of 231,210 rounded and written as a product of a single digit and a power of 10 is 2 × 10^5
231,210 to the nearest whole
= 200, 000
20 × 10^5
Check:
20 × 10^5
= 2 × 10 × 10 × 10 × 10 × 10
= 2 × 100,000
= 200,000
Therefore, the correct answer is 2 × 10^5
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