A 4.5-kilogram bag costs 9.90 dollars. Enter the price per kilogram in dollars.
پاسخ درست
2.2
توضیح
The unit price is 9.90 ÷ 4.5 = 2.2 dollars per kilogram. Multiplying the price by the mass would give 44.55 and would increase the total rather than find the cost of one kilogram.