When a data set is normally distributed, about how much of the data fall within two standard deviations of the mean?
34%
68%
95%
13.5%

The chart below shows the distribution of weeds in yard

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%

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2