Modern medical advances might mean people could live 200 years. In 2009, the life expectancy is about 80 years. Assume that, due to modern advances, life expectancy gains 5.2 years every decade. From 2009, in how many years would humanity achieve a life expectancy of 120 years? years. Humanity would achieve a life expectancy of 120 years in approximately (Round up to the nearest year.) A vending machine accepts nickels, dimes, and quarters. Exact change is needed to make a purchase. How many ways can a person with four nickels, three dimes, and two quarters make a 55-cent purchase from the machine? ways to make the purchase. There are Identify a pattern in the given list of numbers. Then use this pattern to find the next number. (More than one pattern might exist, so it is possible that there is more than one correct answer.) -.-3'), (6,0), (5, 1), (0.___ ) (-6, -12), 0. (21.-3 The next number is (Simplify your answer.)