In a renowned city, the average birth rate is 7 people every two seconds and the death rate is 1 people every two seconds. Estimate the size of the population net increase that occurs in one day.  Select:
A) 32,300	B) 172,800	C) 468,830	D) 338,200	E) 259,200
Every 2 seconds, 6 persons are added (7-1). Every second 3 persons are added.   In a day 24hrs = 24 * 60 Minutes = 24 * 60 * 60= 
<gadget id="calculator">24 * 60 * 60</gadget>
<output>86_400</output>
86400 seconds.   86400 * 3= 
<gadget id="calculator">86400 * 3</gadget>
<output>259_200</output>
259200   Option 259,200
<result>E</result>
In a renowned city, the average birth rate is 7 people every two seconds and the death rate is 1 people every two seconds. Estimate the size of the population net increase that occurs in one day.