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The estimated product of the numbers, 81 and 286, is

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22400

23200

24400

25200

answer is B.

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Detailed Solution

The given numbers are 81 and 286.

81 can be rounded off to the nearest tens as 80.

286 can be rounded off to the nearest tens as 290.

80 × 290 = 23200

Thus, the estimated product of the numbers, 81 and 286, is 23200.

To check if this estimation is reasonable, the actual product of the given numbers can be calculated as

81 × 286 = 23166

23166 can be rounded off to the nearest hundreds as 23200.

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