[-/0.15 Points] DETAILS MY NOTES ASK YOUR TEACHER Married Couples with Children The percentage of families that were married couples with children between 1970 and 2000 is approximately P(t) = 50.5 +0.27 (1 s t s 4) where t is measured in decades, with t = 1 corresponding to 1970. (a) What percentage of families were married couples with children in 1970? In 1990? In 2000? (Round your answers to one decimal place.) in 1970 50.5 % in 1990 37.5 % in 2000 34.7 % (b) How fast was the percentage of families that were married couples with children decreasing in 1980? In 1990? (Round your answers to one decimal place.) in 1980 % per decade in 1990 % per decade Viewing Saved Work Revert to Last Response