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2)Odp A
3) 160%-640
100%-x x= 100x640/160=400
ODP: C
4) 90%-1485
100%-X
100x1485/90=1650
2. pierwiastek ze 144 = 12 odp A
3.
160% - 640
100% - x
x=100*640 / 160 = 400 odp C
4.
90% - 1485
100% - x
x= 100*1485 / 90 = 1650
Odp. Lodówka kosztowała 1650 zł