tolong dikerjain cara2 nya ya,besok harus dikumpul :')

7.
Rugi = HB-HJ
= 910000-890000 = Rp20.000

8. 1 buku = 11000/5 = Rp 2200
1 lusin = 2200 x 12 = Rp 26400

9. Waktu= 7200000/360000 x 3
= 20 x 3 = 60 jam

10. Skala = 4 cm : 224 km
= 4 cm : 22400000cm
= 1 : 5600000

11. Hari = 30x18 / 40
= 540 / 40 = 13,5 hari