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Verified answer
14.04 - 12.40 = 1 jam 24 menit1 jam 24 menit = 84 menit
84 : 12 = 7
U7 = 25 . 2^7
U7 = 25 . 128
U7 = 3.200 bakteri
= 14.04 - 12.40
= 13.64 - 12.40
= 1 jam 24 menit
= 84 menit
= 84 / 12
= 7 kali pembelahan
maka suku pertama a = 25, r = 2, dan n = 7
Sn = a (r^n - 1) / ( r - 1)
S7 = 25 (2^7 - 1) / (2 -1)
= 25 (128 - 1) / 1
= 25 x 127
= 3.175 bakhteri