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Question: About 200,000 telephone calls are made in the United States on an average in a day. Estimate the number of telephone calls made per hour.


A ) 8,383.33
B ) 8,433.33
C ) 8,233.33
D ) 8,333.33

Steps to derive

1 200,0001day = 200,0001day × 1day24hours
 [1 day = 24 hours]

2 = 200,00024hours
 [Simplify.]

3 ≈ 8333/hour
 [Round.]

4 8333 telephone calls are made per hour.



Hence the right answer is Option D

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