Tolong jawab pakai cara ya ka :)

24 C
[tex]r = \sqrt{ {f1}^{2} + {f2}^{2} + 2f1f2 \cos( \alpha ) } \\ r = \sqrt{ {12}^{2} + {5}^{2} + 2(12)(5) \cos(90) } \\ r = \sqrt{144 + 25 + 0} \\ r = 13[/tex]
25 B
[tex]x = 50 \times \sin(30) \\ x = 50 \times \frac{1}{2} \\ x = 25 \\ \\ y = 50 \times \cos(30) \\ y = 50 \times \frac{1}{2} \sqrt{3} \\ y = 25 \sqrt{3} [/tex]

26 D
[tex]125000000000 \\ 125 \times {10}^{9} \\ 1.25 \times {10}^{11} [/tex]

Maaf kalau salah