Because of high mortality and low reproductive success, some fish species experience exponential decline over many years. Atlantic Salmon in Lake Ontario, for example, declined by 80% in the 20-year period leading up to 1896. Ifx_t denotes the number of Atlantic Salmonper square kilometer in Lake Ontario in yeart, where year 0 is 1876, then we can model the decline in the number of fishper square kilometer with a DTDS of the formx_t+1=rx_t.Given the data above, calculate the value ofr.Give your answer with anaccuracy of three decimal places.