Help please, anyone know how to do this???

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 is the ratio of the length of an object in yards to the length of the same object in miles?

Assume that y varies inversely with x. if y=1.6 when x=0.5 find x when y=3.2