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9 .Dik
60.000 m = 6 x 10^4
jawabanya Yang E
10. Dik :
F1 = 3
F2 = 4
R = 5
sudut α = ?
R^2 = F1^2 + F2^ + 2.F1.F2.cos α
5^2 = 3^2 + 4^2 + 2.3.4.cosα
25 = 9 + 16 + 24 cos α
25 = 25 + 24 cos α
Cos α = 25 - 25 / 24
Cos α = 0
α = 90⁰
Jawabannya yang D
11 Dik
1 lusin = 12 buah
1 pensil = 2535
maka Harga 1 lusin = 12 x 2535 = 30420 = 30,42 x 10^3
Jawabannya Yang B
No 12
ga jelas gambarnya Kurang Full
semoga membantu ^_^