Melissa and robbie are flying remote control gliders the altitude of melissas gliderh (a) in feet is modeled by this function where is a us time in seconds after launch m (s) = 0.4 (s³-11s²+ 31s -1) the altitude of robbies glider is modeled by function r where s is time in seconds after launch which glider reaches the greater maximum altitude in the first 6 seconds after launch