Maths question , see the picture, but can someone me! i think it’s got to be quite simple but i don’t actually know how to do it

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%

Identify the number as a rational or irrational.explain. 127

F(x) = 1/x g(x)=x-4 can you evaluate (g*f)(0) ? why or why not?