The increased subsidence of southern Louisiana, from 3 ft to 12 ft every 100 years, contributed to the effects of Hurricane Katrina. Which of the following is not a cause of this subsidence?
A)

the extraction of groundwater

B)

the extraction of oil and gas

C)

the loss of freshwater wetlands

D)

the lack of tall tress such as cypress

E)

the practice of building on hilly areas

The answer is    (d) 7/2======we have    we also  have an integral      notice how function f splits up at x = 0. there's a left piece and a right pieceso we'll need to do the same thing with our integral: split it at x = 0we use a property of integrals that allows us to split up and sum:     notice that for the piecewise function f, the function has the equationf(x) = x when x  ≤ 0. so for the integral  , f(x) = x so it changes into      for the piecewise function f, the function has the equationf(x) = x+1  when x  > 0. for the integral  , we have    therefore, back to our splitted integral: