Estimate by rounding as indicated.An assembly line can produce 437 bicycles each hour. Estimate the number of bicycles produced in 21 hours by rounding the number of bicycles to the nearest hundred and the number of hours to the nearest ten. Also find the exact number of bicycles produced.
A. Estimate: 9240 bicycles; exact: 8740 bicycles
B. Estimate: 8000 bicycles; exact: 9177 bicycles
C. Estimate: 9240 bicycles; exact: 9177 bicycles
D. Estimate: 176,000 bicycles; exact: 8740 bicycles
Answer: B
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