Terry drives 20 miles at an average rate of 50 miles an hour while Sherry drives 30 miles an hour at an average rate of 40 miles per hour. Neither person stops. Terry needs M fewer minutes to complete the trip than Sherry does. What is the value of M?

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%