When a positive integer n is written on a blackboard, an allowed operation is to substitute it with the number ab, where n= a+b, and both a and b are positive integers. If n is initially 24, does there exist a secuence of alowrd operations that leads to the number 2021?

The means and mean absolute deviations of the individual times of members on two 4x400-meter relay track teams are shown in the table below. means and mean absolute deviations of individual times of members of 4x400-meter relay track teams team a team b mean 59.32 s 59.1 s mean absolute deviation 1.5 s 245 what percent of team b's mean absolute deviation is the difference in the means? 9% 15% 25% 65%