The data in the table shows that the percentage of adults in a country who are currently married is declining. Assuming that the percentage of adults who are married will continue to decrease according to the exponential decay​ model: Complete parts​ a) through​ c) below. Year Percent of Adults Who Are Married 1960 67.7 1980 61.1 2000 53.9 2010 46.2 2012 43.8 Question content area bottom Part 1 ​a) Use the data for 1960 and 2012 to find the value of k. kequals enter your response here ​(Simplify your answer. Round to four decimal places as​ needed.)