The concentration of DDT (dichlorodiphenyltrichloroethane) in Lake Erie has been declining exponentially over the last several...

 

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The concentration of DDT (dichlorodiphenyltrichloroethane) in Lake Erie has been declining exponentially over the last several decades. In 1970, the DDT concentration was 13.59 ppm (parts per million). In 1985, the DDT concentration was 2.37 ppm. Q4.1 Part a) 7 Points Using these data points, determine the exponential decay function to model the DDT concentration decline in terms of years, t, where t = 0 represents the year 1970. (Round values to 4 decimal places) Please select file(s) Select file(s) Save Answer Q4.2 Part b) 3 Points According to the model, what was the DDT concentration in 1995? Please select file(s) Select file(s) The concentration of DDT (dichlorodiphenyltrichloroethane) in Lake Erie has been declining exponentially over the last several decades. In 1970, the DDT concentration was 13.59 ppm (parts per million). In 1985, the DDT concentration was 2.37 ppm. Q4.1 Part a) 7 Points Using these data points, determine the exponential decay function to model the DDT concentration decline in terms of years, t, where t = 0 represents the year 1970. (Round values to 4 decimal places) Please select file(s) Select file(s) Save Answer Q4.2 Part b) 3 Points According to the model, what was the DDT concentration in 1995? Please select file(s) Select file(s)