In a renowned city, the average birth rate is 5 people every two seconds and the death rate is 3 people every two seconds. Estimate the size of the population net increase that occurs in one day. Choose the correct choice from the following answers: A) 85,400 B) 86,400 C) 87,400 D) 88,400 E) 89,400
This question can be modified so that the birth rate is given every m seconds and the death rate is given every n seconds.   For this particular question : Increase in the population every 2 seconds = 5-3= 
<gadget id="calculator">5-3</gadget>
<output>2</output>
2 people.   Total 2 second interval in a day= 24*60*60/2 = 43,200   Population increase = 43,200 * 2 = 86,400. Hence 86,400.
<result>B</result>
In a renowned city, the average birth rate is 5 people every two seconds and the death rate is 3 people every two seconds. Estimate the size of the population net increase that occurs in one day.