tolong Bantu ya kak... no. 29 dan 30

29) √13.5 = √1.35*10 = √13.5 * √10 = 2p√10 (B)
30) (a/b)^x-1 = (b/a)^x-3
(a/b)^x-1 = (a/b)^3-x
x-1 = 3-x
2x = 4
x = 4/2 = 2 (C)