HELP ME PLEASE URGENT

How many sides does a regular polygon have if each exterior angle measures 72a.3b.4c.5d.6

Write the fraction or mixed number and the decimal shown by the model

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%