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39. c
40. b
= 6+7+6+5+7+8+8+10+8+7 / 10
= 72/10
= 7,2kg
option»C
40).Jan = 80
Feb = 70
Mar = 100
Apr = 120
Mei = 110
Jan—Feb = 10
Feb—Mar = 30
Mar—Apr = 20
peninglatan tertinggi Maret
Option »B
maaf klok salh