Number of new chronic bronchitis cases due to air pollution occurring between January 1 and June 30, 2012= 26 Number of active chronic bronchitis cases due to air pollution according to the city register on June 30, 2012= 264 Find the incidence rate per 100,000 population of chronic bronchitis cases for the 6 months period.

Incidence rate=0.00026

Step-by-step explanation:

Incidence rate is the rate of new occurrence of a particular disease divided by the population of people at risk of the disease.so for this question

The new cases= 26

Population at risk =100,000

Incidence rate = 26/100,000

= 0.00026

135 is your answer

step-by-step explanation:

try 180 times three then divide that number by 4 (sides) to get your answer. im glad to : )