tolong dari 115 - 121 :) poinnya udh ditambah banyak dan terima kasih sebelumnya :)

115. p = √2/3
        q = √8/3
         p . q = √2/3 . √8/3
                  = √16/9
                  = 4/3 (c)
116. √x = y
         (√x = y)²
          x = y² (a)
117. √a² . b²/c²
        = a¹ . b¹/c¹
        = ab/c (c)
118. a = 24b = 24.3c = 72c
        b = 3c
       √6 . 72 c . 3c / c
       √1296c² / c
       36c/c
       = 36 (d)
119. p = √12,3
        q = √1,23
        √123 - √0,123
        √1,23.100 - √12,3 .10⁻²
        10q - 1/10p (b)
120. √190,4 = 13,8
         √19,04 = 4,36
         √190.400 = √19,04 . 10⁴
                          = 4,36 . 10²
                          = 436 (b)
121. √1,65 = 1,28
        √16,5 = 4,06
         √0,0165 = √1,65 . 10⁻²
                        = 1,28 . 0,1
                        = 0,128 (c)