tolong jawab pakai caranya ya nomor 1 2 dan 3 terimakasih

1.)

[tex]4 \frac{1}{2} \div 1 \frac{1}{2} \times 0.02 + 3 \\ = \frac{9}{2} \div \frac{3}{2} \times \frac{2}{100} + 3 \\ = \frac{9}{2} \times \frac{2}{3} \times \frac{2}{100} + 3 \\ = \frac{6}{100} + 3 \\ = \frac{6}{100} + \frac{300}{100} \\ = \frac{306}{100} \\ = 3 \frac{3}{50} \\ = 3.06[/tex]

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2.)

S = skala
Js = jarak sebenarnya
Jp = jarak peta

[tex]s = \frac{jp}{js} \\ \frac{1}{2500} = \frac{80}{js} \\ js = 2500 \times 80 \\ js = 200000 \: cm = 200 \: m = 2 \: km[/tex]

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3.)

Uang Doni :

Doni / selisih doni dan dava × selisih uang

[tex] \frac{4}{1} \times 5000 \\ = 4 \times 5000 \\ = 2 0000[/tex]

Jadi, uang Doni = Rp20000