Ventilation is an effective way to improve indoor air quality. In nonsmoking restaurants, air circulation requirements (in
) are given by the function
, where x is the number of people in the dining area. Find
. Use
to determine the maximum number of people that should be in a restaurant having a ventilation capability of 2,350
. 
A) 55
B) 56
C) 62
D) 68
E) 61
Correct Answer:
Verified
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