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Homework Statement
the amount of nitrogen dioxide, a brown gas that impairs breathing, present in the atmosphere on a certain day in may in the city of long beach is appoximated by:
A(t) = ((544) / (4 + (t - 4.5)^2) + 28 t is on interval [0, 11]
where A(t) is measured in pollutant standard index (PSI) and t is measured in hours with t = 0 corresponding to 7 A.M. What is the average amount of the pollutant present in the atmosphere between 7 A.M. and 2 P.M. on that day in the city?
Homework Equations
I know that this problem can be solved using trig substitution since that is the section in my book, in which it came out from.
The Attempt at a Solution
I've made several attempts to solve this problem through integration/trig sub. but i keep getting the incorrect value.