ATLANTA — Demarco Cox scored 13 points, and Charles Mitchell added 12 and had 14 rebounds, to power Georgia Tech to a 66-46 win over Alabama A&M on Tuesday night. Cox, a 6-foot-8, 276-pound senior transfer from Ole Miss was 6 of 8 from the floor. Mitchell, a 6-foot-8, 269-pound junior transfer from Maryland, grabbed nine offensive rebounds.